diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
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+
+  When we speak of free software, we are referring to freedom, not
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+
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+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+
+Activities other than copying, distribution and modification are not
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+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
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+
+You may charge a fee for the physical act of transferring a copy, and
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+
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+
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+
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+
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+
+These requirements apply to the modified work as a whole.  If
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+
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+
+  6. Each time you redistribute the Program (or any work based on the
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+
+  7. If, as a consequence of a court judgment or allegation of patent
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+
+If any portion of this section is held invalid or unenforceable under
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+
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+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
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+may add an explicit geographical distribution limitation excluding
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+
+  9. The Free Software Foundation may publish revised and/or new versions
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+be similar in spirit to the present version, but may differ in detail to
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+
+Each version is given a distinguishing version number.  If the Program
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+
+  10. If you wish to incorporate parts of the Program into other free
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+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    {description}
+    Copyright (C) {year}  {fullname}
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  {signature of Ty Coon}, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/lambdatex.cabal b/lambdatex.cabal
new file mode 100644
--- /dev/null
+++ b/lambdatex.cabal
@@ -0,0 +1,65 @@
+name:                lambdatex
+version:             0.1.0.0
+synopsis:            Type-Safe LaTeX EDSL
+description:         
+  ΛTeX, pronounced 'LambdaTeX' is a Haskell EDSL that adds type-safety to LaTeX.
+  ΛTeX-generated LaTeX code should compile without errors.
+
+  TODO(kerckhove) big fancy example
+homepage:            http://github.com/NorfairKing/lambdatex
+license:             GPL
+license-file:        LICENSE
+author:              Tom Sydney Kerckhove
+maintainer:          syd.kerckhove@gmail.com
+copyright:           2015 Tom Sydney Kerckhove
+category:            Text
+build-type:          Simple
+-- extra-source-files:
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Text.LaTeX.LambdaTeX
+                       Text.LaTeX.LambdaTeX.Error
+                       Text.LaTeX.LambdaTeX.Package
+                       Text.LaTeX.LambdaTeX.Package.Internal
+                       Text.LaTeX.LambdaTeX.Package.Types
+                       Text.LaTeX.LambdaTeX.Part
+                       Text.LaTeX.LambdaTeX.Reference
+                       Text.LaTeX.LambdaTeX.Reference.Internal
+                       Text.LaTeX.LambdaTeX.Reference.Types
+                       Text.LaTeX.LambdaTeX.Selection
+                       Text.LaTeX.LambdaTeX.Selection.Internal
+                       Text.LaTeX.LambdaTeX.Selection.Types
+                       Text.LaTeX.LambdaTeX.Types
+                       Text.LaTeX.LambdaTeX.Utils
+  build-depends:       base             >= 4.6      && < 5.0
+                     , HaTeX            >= 3.16     && < 3.17
+                     , mtl              >= 2.2      && < 2.3
+                     , text             >= 1.2      && < 1.3
+                     , containers       >= 0.5      && < 0.6
+                     , transformers     >= 0.4      && < 0.5
+                     , directory        >= 1.2      && < 1.3
+  ghc-options:        -Wall
+                      -fwarn-unused-imports
+                      -fwarn-incomplete-patterns
+                      -fno-warn-unused-do-bind
+                      -fno-warn-name-shadowing
+                      -fno-warn-orphans
+                      -fforce-recomp
+  default-language:    Haskell2010
+
+test-suite lambdatex-test
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       base
+                     , lambdatex
+                     , hspec
+                     , QuickCheck
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/NorfairKing/lambdatex
diff --git a/src/Text/LaTeX/LambdaTeX.hs b/src/Text/LaTeX/LambdaTeX.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX.hs
@@ -0,0 +1,127 @@
+-- |
+-- TODO(kerckhove) big example here!
+--
+{-# LANGUAGE OverloadedStrings #-}
+module Text.LaTeX.LambdaTeX (
+    -- * Building ΛTeX
+      module Text.LaTeX.LambdaTeX
+
+    -- ** Selections
+    , module Text.LaTeX.LambdaTeX.Selection
+
+    -- ** References
+    , module Text.LaTeX.LambdaTeX.Reference
+
+    -- ** Packages dependencies
+    , module Text.LaTeX.LambdaTeX.Package
+
+    -- ** Re-exports
+    , module Text.LaTeX.LambdaTeX.Types
+
+    ) where
+
+import           Control.Monad.IO.Class                  (MonadIO (..))
+
+import qualified Data.Set                                as S
+import qualified Data.Text                               as T
+import qualified Data.Text.IO                            as T
+
+import           Text.LaTeX.Base                         (LaTeX, renderFile)
+
+import           Text.LaTeX.LambdaTeX.Package
+import           Text.LaTeX.LambdaTeX.Package.Internal
+import           Text.LaTeX.LambdaTeX.Reference
+import           Text.LaTeX.LambdaTeX.Reference.Internal
+import           Text.LaTeX.LambdaTeX.Reference.Types
+import           Text.LaTeX.LambdaTeX.Selection
+import           Text.LaTeX.LambdaTeX.Selection.Types
+import           Text.LaTeX.LambdaTeX.Types
+import           Text.LaTeX.LambdaTeX.Utils
+
+-- | Build all the files for a LaTeX project given by a ΛTeXT generator
+--   This either returns Left with an error or Right () to signify success.
+--
+--   This function takes care of some of the LaTeX tediousness:
+--
+--      * LaTeX file generation
+--      * Automatic bibtex file generation
+--      * All safety provided by 'execLambdaTeXT' (in the form of textual errors)
+--      * TODO(kerckhove) Automatic asynchronic resolution of figure dependencies on graphviz or tikz figures
+buildLaTeXProject :: MonadIO m => ΛTeXT m a -> ProjectConfig -> m (Either [ΛError] ())
+buildLaTeXProject func conf = do
+    (errs, (latex, refs)) <- execLambdaTeXT func $ projectGenerationConfig conf
+
+    -- Render tex file
+    let mainTexFile = projectTexFileName conf ++ ".tex"
+    liftIO $ renderFile mainTexFile latex
+
+    -- Render bib file
+    let mainBibFile = projectBibFileName conf ++ ".bib"
+    liftIO $ removeIfExists mainBibFile
+    liftIO $ T.appendFile mainBibFile $ renderReferences refs
+
+    return $ if null errs
+        then Right ()
+        else Left errs
+
+-- | Execute a ΛTeXT generation
+--   This either returns a tuple of the errors and a tuple of the resulting LaTeX value and a list of external references that need to be put into a bibtex file.
+--
+--   This function takes care of a lot of safety issues:
+--
+--      * Subset selection. This allows you to build large documents in parts.
+--      * External dependency selection. No more '??' for external references in the output pdf.
+--      * Internal dependency safety. No more '??' for external references in the internal pdf.
+--      * Package dependency resolution, TODO(kerckhove) with packages in the right order
+--      * Dependency selection of figure dependencies on graphviz or tikz figures
+execLambdaTeXT :: Monad m => ΛTeXT m a -> GenerationConfig -> m ([ΛError], (LaTeX, [Reference]))
+execLambdaTeXT func conf = do
+    ((_,latex), _, output) <- runΛTeX func (ΛConfig $ generationSelection conf) initState
+    let result = injectPackageDependencies (S.toList $ outputPackageDependencies output) latex
+    let refs = S.toList $ outputExternalReferences output
+
+    -- Check reference errors
+    let made = outputLabelsMade output
+        needed = outputLabelsNeeded output
+        diff = S.difference needed made
+
+    let referss = map ReferenceMissing $ S.toList diff
+
+    return (referss, (result, refs))
+
+  where
+    initState :: ΛState
+    initState = ΛState { stateCurrentPart = emptyPart }
+
+
+-- * Configuration
+
+-- | Configuration of a ΛTeX project
+data ProjectConfig = ProjectConfig {
+      projectGenerationConfig :: GenerationConfig
+    , projectBibFileName      :: String
+    , projectTexFileName      :: String
+    }
+
+-- | Default project configuration.
+--
+--  Modify this instead of building your own 'ProjectConfig'
+defaultProjectConfig :: ProjectConfig
+defaultProjectConfig = ProjectConfig {
+      projectGenerationConfig = defaultGenerationConfig
+    , projectBibFileName = "main"
+    , projectTexFileName = "main"
+    }
+
+-- | Configuration of ΛTeX generation
+data GenerationConfig = GenerationConfig {
+      generationSelection :: Selection
+    }
+
+-- | Default generation config.
+--
+--  Modify this instead of building your own 'GenerationConfig'
+defaultGenerationConfig :: GenerationConfig
+defaultGenerationConfig = GenerationConfig {
+      generationSelection = [All]
+    }
diff --git a/src/Text/LaTeX/LambdaTeX/Error.hs b/src/Text/LaTeX/LambdaTeX/Error.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Error.hs
@@ -0,0 +1,6 @@
+module Text.LaTeX.LambdaTeX.Error where
+
+import           Data.Text (Text)
+
+data ΛError = ReferenceMissing Text
+    deriving (Show, Eq)
diff --git a/src/Text/LaTeX/LambdaTeX/Package.hs b/src/Text/LaTeX/LambdaTeX/Package.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Package.hs
@@ -0,0 +1,21 @@
+-- | This module allows you to automatically resolve LaTeX package dependencies in your document.
+--
+-- Note: If you want different arguments to a package, you have to specify this by making a 'manual' 'packageDep' declaration before your document.
+module Text.LaTeX.LambdaTeX.Package where
+
+import           Text.LaTeX.Base.Syntax
+
+import qualified Data.Set                           as S
+
+import           Text.LaTeX.LambdaTeX.Package.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- | Declare a dependency to a package, with given arguments
+packageDep :: Monad m => [LaTeX] -- ^ Arguments
+                      -> Text -- ^ Name of the LaTeX package
+                      -> ΛTeXT m ()
+packageDep args name = λtell $ mempty { outputPackageDependencies = S.singleton (PackageDep name args) }
+
+-- | Declare a dependency to a package without any arguments
+packageDep_ :: Monad m => Text -> ΛTeXT m ()
+packageDep_ name = packageDep [] name
diff --git a/src/Text/LaTeX/LambdaTeX/Package/Internal.hs b/src/Text/LaTeX/LambdaTeX/Package/Internal.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Package/Internal.hs
@@ -0,0 +1,27 @@
+module Text.LaTeX.LambdaTeX.Package.Internal where
+
+import           Text.LaTeX.Base.Syntax
+
+import           Text.LaTeX.LambdaTeX.Package.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- | Inject package dependencies into a given LaTeX document.
+--   This is done by top-level functions in @Text.LaTeX.LambdaTeX@ automatically
+injectPackageDependencies :: [PackageDep] -> LaTeX -> LaTeX
+injectPackageDependencies ps = go
+    -- We're looking for this: TeXComm "documentclass" ...
+  where
+    -- We have to go looking through the LaTeX :(
+    go t@(TeXComm "documentclass" _) = TeXSeq t packages
+    go (TeXSeq t1 t2) = TeXSeq (go t1) (go t2)
+    go c = c
+
+    packages :: LaTeX
+    packages = mconcat $ map (\(PackageDep name args) -> usepackage args name) ps
+
+
+-- | Redefinition of @usepackage@ to use Text
+--   Don't use this directly, use the packageDep instead!
+usepackage :: [LaTeX] -> Text -> LaTeX
+usepackage ls pn = TeXComm "usepackage" [MOptArg ls, FixArg $ TeXRaw pn]
+
diff --git a/src/Text/LaTeX/LambdaTeX/Package/Types.hs b/src/Text/LaTeX/LambdaTeX/Package/Types.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Package/Types.hs
@@ -0,0 +1,14 @@
+module Text.LaTeX.LambdaTeX.Package.Types where
+
+import           Data.Ord               (comparing)
+import           Data.Text              (Text)
+
+import           Text.LaTeX.Base.Syntax (LaTeX)
+
+data PackageDep = PackageDep {
+      packageDepName    :: Text
+    , packageDepOptions :: [LaTeX]
+  } deriving (Show, Eq)
+
+instance Ord PackageDep where
+    compare = comparing packageDepName
diff --git a/src/Text/LaTeX/LambdaTeX/Part.hs b/src/Text/LaTeX/LambdaTeX/Part.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Part.hs
@@ -0,0 +1,15 @@
+module Text.LaTeX.LambdaTeX.Part where
+
+import           Data.Text (Text)
+
+newtype Part = Part { unPart :: [Text] }
+
+emptyPart :: Part
+emptyPart = Part { unPart = [] }
+
+pushPart :: Part -> Text -> Part
+pushPart p t = Part { unPart = unPart p ++ [t] }
+
+popPart :: Part -> Part
+popPart p = Part { unPart = init $ unPart p }
+
diff --git a/src/Text/LaTeX/LambdaTeX/Reference.hs b/src/Text/LaTeX/LambdaTeX/Reference.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Reference.hs
@@ -0,0 +1,81 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Text.LaTeX.LambdaTeX.Reference where
+
+import           Text.LaTeX.Base.Class
+import           Text.LaTeX.Base.Syntax
+
+import qualified Text.LaTeX.Base.Commands                as H (label, pageref,
+                                                               ref)
+
+import           Text.LaTeX.LambdaTeX.Reference.Internal
+import           Text.LaTeX.LambdaTeX.Reference.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- * Internal references
+-- An internal references point is defined by a label
+-- It is then referenced with @ref label@
+--
+-- ΛTeX automatically ensures that those references are always internally consistent
+-- BUT you have to make sure that you use these functions instead of the regular ones.
+
+-- ** Labels
+
+-- | Label a part
+label :: Monad m => Text -> ΛTeXT m ()
+label l = do
+    fromLaTeX $ H.label $ TeXRaw l
+    addLabelMade l
+
+-- | The safe version of LaTeX's @ref@
+ref :: Monad m => Text -> ΛTeXT m ()
+ref l = do
+    fromLaTeX $ H.ref $ TeXRaw l
+    addLabelNeeded l
+
+-- | The safe version of LaTeX's @pageref@
+pageref :: Monad m => Text -> ΛTeXT m ()
+pageref l = do
+    fromLaTeX $ H.pageref $ TeXRaw l
+    addLabelNeeded l
+
+-- * External references
+-- ** Defining references
+
+-- TODO(kerckhove) Check for duplicate fields?
+
+-- | Define an external reference.
+--   Use 'cite' or 'nocite' to use this in your document.
+makeReference :: ReferenceType -> Text -> [(Text, Text)] -> Reference
+makeReference = Reference
+
+-- ** Using references
+
+-- | Refer to an external reference.
+cite :: Monad m => Reference -> ΛTeXT m ()
+cite ref = do
+  fromLaTeX $ comm1 "cite" $ TeXRaw $ referenceName ref
+  addReference ref
+
+-- | Put an external reference in your list of references without using it.
+nocite :: Monad m => Reference -> ΛTeXT m ()
+nocite ref = do
+  fromLaTeX $ comm1 "nocite" $ TeXRaw $ referenceName ref
+  addReference ref
+
+-- ** Reference Types
+--
+-- See [The Wiki article on which fields each of them requires](https://en.wikibooks.org/wiki/LaTeX/Bibliography_Management)
+--
+-- TODO(kerckhove) Generate these!
+unpublished :: ReferenceType
+unpublished = "unpublished"
+
+lectureSlides :: ReferenceType
+lectureSlides = "unpublished"
+
+online :: ReferenceType
+online = "online"
+
+article :: ReferenceType
+article = "article"
+
diff --git a/src/Text/LaTeX/LambdaTeX/Reference/Internal.hs b/src/Text/LaTeX/LambdaTeX/Reference/Internal.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Reference/Internal.hs
@@ -0,0 +1,43 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Text.LaTeX.LambdaTeX.Reference.Internal where
+
+import qualified Data.Set                             as S
+import qualified Data.Text                            as T
+
+import           Text.LaTeX.LambdaTeX.Reference.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- * Internal references
+
+-- | Declare that a label has been made
+addLabelMade ::  Monad m => Text -> ΛTeXT m ()
+addLabelMade label = λtell $ mempty { outputLabelsMade = S.singleton label }
+
+-- | Declare that a label is needed
+addLabelNeeded ::  Monad m => Text -> ΛTeXT m ()
+addLabelNeeded label = λtell $ mempty { outputLabelsNeeded = S.singleton label }
+
+-- * External references
+
+-- | Render references to bib(La)TeX format
+renderReferences :: [Reference] -> Text
+renderReferences rs = (`mappend` "\n\n") . T.intercalate ",\n\n" $ map showRef rs
+  where
+    showRef :: Reference -> Text
+    showRef r = mconcat
+        [
+          "@"
+        , referenceType r
+        , "{"
+        , referenceName r
+        , ",\n"
+        , T.intercalate ",\n" (map showField $ referenceFields r)
+        , "\n}"
+        ]
+
+    showField :: (Text, Text) -> Text
+    showField (a, b) = mconcat ["  ", a, " = {", b, "}"]
+
+-- | Add a reference to a ΛTeX generator
+addReference :: Monad m => Reference -> ΛTeXT m ()
+addReference ref = λtell $ mempty { outputExternalReferences = S.singleton ref }
diff --git a/src/Text/LaTeX/LambdaTeX/Reference/Types.hs b/src/Text/LaTeX/LambdaTeX/Reference/Types.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Reference/Types.hs
@@ -0,0 +1,16 @@
+module Text.LaTeX.LambdaTeX.Reference.Types where
+
+import           Data.Ord  (comparing)
+import           Data.Text (Text)
+
+type ReferenceType = Text
+data Reference = Reference {
+      referenceType   :: ReferenceType
+    , referenceName   :: Text
+    , referenceFields :: [(Text, Text)]
+  } deriving (Show, Eq)
+
+instance Ord Reference where
+    compare = comparing referenceName
+
+
diff --git a/src/Text/LaTeX/LambdaTeX/Selection.hs b/src/Text/LaTeX/LambdaTeX/Selection.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Selection.hs
@@ -0,0 +1,46 @@
+module Text.LaTeX.LambdaTeX.Selection where
+
+import           Control.Monad                           (when)
+
+import qualified Data.Text                               as T
+
+import           Text.LaTeX.LambdaTeX.Selection.Internal
+import           Text.LaTeX.LambdaTeX.Selection.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- * Making selections
+
+-- | Construct a selection from a space-separated list of strings representing selectors
+--
+-- > constructSelection = map constructSelector . words
+constructSelection :: String -> Selection
+constructSelection = map constructSelector . words
+
+-- | Construct a selector from a string
+--
+-- >>> constructSelector "all"
+-- > All
+--
+-- >>> constructSelector "mySection.mySubsection"
+-- > Match ["mySection", "mySubsection"]
+--
+-- >>> constructSelector "+mySection.mySubsection"
+-- > Match ["mySection", "mySubsection"]
+--
+-- >>> constructSelector "-mySection.mySubsection"
+-- > Ignore ["mySection", "mySubsection"]
+constructSelector :: String -> Selector
+constructSelector "all" = All
+constructSelector ('+':s) = Match $ map T.pack $ split s
+constructSelector ('-':s) = Ignore $ map T.pack $ split s
+constructSelector s = Match $ map T.pack $ split s
+
+-- * Using selections
+
+-- | Declare a sub-part of the document with a name.
+--   This allows you to use the subset-selection feature later.
+note :: Monad m => Text -> ΛTeXT m () -> ΛTeXT m ()
+note partname func = inPart partname $ do
+    s <- isSelected
+    when s func
+
diff --git a/src/Text/LaTeX/LambdaTeX/Selection/Internal.hs b/src/Text/LaTeX/LambdaTeX/Selection/Internal.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Selection/Internal.hs
@@ -0,0 +1,82 @@
+module Text.LaTeX.LambdaTeX.Selection.Internal where
+
+import           Data.List                            (isPrefixOf)
+
+import           Text.LaTeX.LambdaTeX.Selection.Types
+import           Text.LaTeX.LambdaTeX.Types
+
+-- | Whether a part is selected by a given list of selectors.
+--
+-- A part is selected if:
+--
+-- All parts are selected or
+-- It it is matched and not ignored.
+selects :: Part -> [Selector] -> Bool
+selects (Part ps) ss = go ps ss False
+    where
+        go :: [Text] -> [Selector] -> Bool -> Bool
+        go _ [] b                       = b
+        go ps (All:ss) _                = go ps ss True
+        go ps ((Match s):ss) b          = if ps `matches` s
+                                          then go ps ss True
+                                          else go ps ss b
+        go ps ((Ignore s):ss) True      = if ps `matches` s
+                                          then go ps ss False
+                                          else go ps ss True
+        go ps ((Ignore _):ss) False     = go ps ss False
+
+-- | Whether the current part is selected to be generated
+isSelected :: Monad m => ΛTeXT m Bool
+isSelected = do
+    part <- currentPart
+    sels <- λasks configSelection
+    return $ selects part sels
+
+-- * Current part Helpers
+
+-- | Returns the current part from the ΛTeX state
+currentPart :: Monad m => ΛTeXT m Part
+currentPart = λgets stateCurrentPart
+
+-- | Execute the following function with a given sub-part name
+inPart :: Monad m => Text -> ΛTeXT m () -> ΛTeXT m ()
+inPart partname func = do
+    pushCurrentPart partname
+    func
+    popCurrentPart
+
+-- | Push a new part name onto the current part stack
+--
+-- WARNING: This should never be used outside of 'inPart'
+pushCurrentPart :: Monad m => Text -> ΛTeXT m ()
+pushCurrentPart partname = λmodify (\s -> s { stateCurrentPart = pushPart (stateCurrentPart s) partname})
+
+-- | Pop a part name off the current part stack
+--
+-- WARNING: This should never be used outside of 'inPart'
+popCurrentPart :: Monad m => ΛTeXT m ()
+popCurrentPart = λmodify (\s -> s { stateCurrentPart = popPart $ stateCurrentPart s })
+
+
+-- * Text Helpers
+
+-- | Split a string on a dot.
+-- This can be useful to convert from a 'Selector's textual representation back to a selector
+--
+-- > split = splitOn '.'
+split :: String -> [String]
+split = splitOn '.'
+
+-- | Split a string on a specific character
+splitOn :: Char -> String -> [String]
+splitOn c s = go s []
+  where
+    go :: String -> String -> [String]
+    go [] s = [s]
+    go (sc:ss) acc | sc == c   = acc : go [] ss
+                   | otherwise = go ss (acc ++ [sc])
+
+
+-- | Tests whether a given part matches a given selector's part specification
+matches :: [Text] -> [Text] -> Bool
+matches = flip isPrefixOf
diff --git a/src/Text/LaTeX/LambdaTeX/Selection/Types.hs b/src/Text/LaTeX/LambdaTeX/Selection/Types.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Selection/Types.hs
@@ -0,0 +1,10 @@
+module Text.LaTeX.LambdaTeX.Selection.Types where
+
+import           Data.Text (Text)
+
+type Selection = [Selector]
+data Selector = All
+              | Match [Text]
+              | Ignore [Text]
+    deriving (Show, Eq)
+
diff --git a/src/Text/LaTeX/LambdaTeX/Types.hs b/src/Text/LaTeX/LambdaTeX/Types.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Types.hs
@@ -0,0 +1,209 @@
+{-# LANGUAGE CPP                        #-}
+{-# LANGUAGE FlexibleInstances          #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE MultiParamTypeClasses      #-}
+{-# LANGUAGE TypeFamilies               #-}
+{-# LANGUAGE UndecidableInstances       #-}
+
+module Text.LaTeX.LambdaTeX.Types (
+      module Text.LaTeX.LambdaTeX.Types
+    , module Text.LaTeX.LambdaTeX.Part
+    , module Text.LaTeX.LambdaTeX.Error
+    , module Text.LaTeX.LambdaTeX.Package.Types
+    , module Text.LaTeX.LambdaTeX.Reference.Types
+    , module Text.LaTeX.LambdaTeX.Selection.Types
+
+#if !MIN_VERSION_base(4,8,0)
+    , module Control.Applicative
+    , module Data.Monoid
+#endif
+    , Text
+    ) where
+
+#if !MIN_VERSION_base(4,8,0)
+import           Control.Applicative
+import           Data.Monoid                          hiding (All)
+#endif
+
+import           Control.Monad                        (liftM)
+import           Control.Monad.IO.Class               (MonadIO, liftIO)
+import           Control.Monad.Reader                 (MonadReader (..), asks)
+import           Control.Monad.RWS                    (RWST (..))
+import           Control.Monad.State                  (MonadState (..), gets,
+                                                       modify)
+import           Control.Monad.Trans                  (MonadTrans (..), lift)
+import           Control.Monad.Writer                 (MonadWriter (..))
+
+import           Data.Set                             (Set)
+import qualified Data.Set                             as S
+import           Data.String                          (IsString (..))
+import           Data.Text                            (Text)
+
+import           Text.LaTeX.Base                      (LaTeX, LaTeXT, runLaTeXT)
+import           Text.LaTeX.Base.Class                (LaTeXC (..), fromLaTeX)
+import           Text.LaTeX.Base.Writer               (extractLaTeX, textell)
+
+import           Text.LaTeX.Packages.AMSMath          ()
+
+import           Text.LaTeX.LambdaTeX.Error
+import           Text.LaTeX.LambdaTeX.Package.Types
+import           Text.LaTeX.LambdaTeX.Part
+import           Text.LaTeX.LambdaTeX.Reference.Types
+import           Text.LaTeX.LambdaTeX.Selection.Types
+
+-- * The ΛTeX Monad
+type LambdaTeXT = ΛTeXT
+type LambdaTeXT_ m = ΛTeXT_ m
+
+type ΛTeXT_ m = ΛTeXT m ()
+
+newtype ΛTeXT m a =
+    ΛTeXT { unwrapΛTeXT :: LaTeXT (RWST ΛConfig ΛOutput ΛState m) a }
+    deriving (Functor, Applicative, Monad)
+
+-- TODO(kerckhove) Move and add amsmath dependency
+instance (Monad m, a ~ ()) => Num (ΛTeXT m a) where
+    (+) a b = ΛTeXT $ unwrapΛTeXT a + unwrapΛTeXT b
+    (-) a b = ΛTeXT $ unwrapΛTeXT a - unwrapΛTeXT b
+    (*) a b = ΛTeXT $ unwrapΛTeXT a * unwrapΛTeXT b
+    negate = ΛTeXT . negate . unwrapΛTeXT
+    fromInteger = fromLaTeX . fromInteger
+    abs = ΛTeXT . abs . unwrapΛTeXT
+    -- Non-defined methods
+    signum = ΛTeXT . signum . unwrapΛTeXT
+
+
+-- TODO(kerckhove) Move and add amsmath dependency
+instance (Monad m, a ~ ()) => Fractional (ΛTeXT m a) where
+    (/) a b = ΛTeXT $ unwrapΛTeXT a / unwrapΛTeXT b
+    fromRational = fromLaTeX . fromRational
+
+-- TODO(kerckhove) Also instantiate floating?
+
+runΛTeX :: Monad m => ΛTeXT m a -> ΛConfig -> ΛState -> m ((a, LaTeX), ΛState, ΛOutput)
+runΛTeX func conf state = runRWST (runLaTeXT $ unwrapΛTeXT func) conf state
+
+instance MonadTrans ΛTeXT where
+    lift = ΛTeXT . lift . lift
+
+instance MonadIO m => MonadIO (ΛTeXT m) where
+    liftIO = lift . liftIO
+
+instance (Monad m, a ~ ()) => LaTeXC (ΛTeXT m a) where
+    liftListL f xs = mapM extractΛLaTeX_ xs >>= λtextell . f
+
+instance (Monad m, a ~ ()) => IsString (ΛTeXT m a) where
+    fromString = λtextell . fromString
+
+instance (Monad m, a ~ ()) => Monoid (ΛTeXT m a) where
+    mempty = return ()
+    mappend = (>>)
+
+λtextell :: Monad m => LaTeX -> ΛTeXT m ()
+λtextell = ΛTeXT . textell
+
+λtell :: Monad m => ΛOutput -> ΛTeXT m ()
+λtell = ΛTeXT . tell
+
+λask :: Monad m => ΛTeXT m ΛConfig
+λask = λasks id
+
+λasks :: Monad m => (ΛConfig -> a) -> ΛTeXT m a
+λasks = ΛTeXT . asks
+
+λget :: Monad m => ΛTeXT m ΛState
+λget = λgets id
+
+λgets :: Monad m => (ΛState -> a) -> ΛTeXT m a
+λgets = ΛTeXT . gets
+
+λmodify :: Monad m => (ΛState -> ΛState) -> ΛTeXT m ()
+λmodify = ΛTeXT . modify
+
+-- | This function run a 'LaTeXT' computation,
+-- lifting the result again in the monad.
+extractΛLaTeX :: Monad m => ΛTeXT m a -> ΛTeXT m (a,LaTeX)
+extractΛLaTeX = ΛTeXT . extractLaTeX . unwrapΛTeXT
+
+-- | Like 'extractΛLaTeX' but without the result
+extractΛLaTeX_ :: Monad m => ΛTeXT m a -> ΛTeXT m LaTeX
+extractΛLaTeX_ = liftM snd . extractΛLaTeX
+
+-- | Internal ΛTeXT configration
+data ΛConfig    = ΛConfig {
+      configSelection :: Selection
+    }
+
+-- | Internal ΛTeXT configration output
+data ΛOutput    = ΛOutput {
+      outputPackageDependencies :: Set PackageDep
+    , outputExternalReferences  :: Set Reference
+    , outputLabelsMade          :: Set Text
+    , outputLabelsNeeded        :: Set Text
+    }
+
+instance Monoid ΛOutput where
+    mempty = ΛOutput {
+            outputPackageDependencies   = S.empty
+          , outputExternalReferences    = S.empty
+          , outputLabelsMade = S.empty
+          , outputLabelsNeeded = S.empty
+        }
+
+    mappend o1 o2 = ΛOutput {
+            outputPackageDependencies =
+                S.union
+                    (outputPackageDependencies o1)
+                    (outputPackageDependencies o2)
+          , outputExternalReferences =
+                S.union
+                    (outputExternalReferences o1)
+                    (outputExternalReferences o2)
+          , outputLabelsMade =
+                S.union
+                    (outputLabelsMade o1)
+                    (outputLabelsMade o2)
+          , outputLabelsNeeded =
+                S.union
+                    (outputLabelsNeeded o1)
+                    (outputLabelsNeeded o2)
+        }
+
+-- | Internal ΛTeXT configration state
+data ΛState = ΛState {
+      stateCurrentPart :: Part
+    }
+
+-- Orphan Monad Transformer instances for LaTeXT
+instance MonadReader r m => MonadReader r (LaTeXT m) where
+    ask   = lift ask
+    local = local
+    reader = lift . reader
+
+instance MonadState s m => MonadState s (LaTeXT m) where
+    get = lift get
+    put = lift . put
+    state = lift . state
+
+instance MonadWriter w m => MonadWriter w (LaTeXT m) where
+    tell = lift . tell
+    listen = listen
+    pass = pass
+
+
+-- Monad Transformer instances for ΛTeXT
+instance MonadReader r m => MonadReader r (ΛTeXT m) where
+    ask   = lift ask
+    local = local
+    reader = lift . reader
+
+instance MonadState s m => MonadState s (ΛTeXT m) where
+    get = lift get
+    put = lift . put
+    state = lift . state
+
+instance MonadWriter w m => MonadWriter w (ΛTeXT m) where
+    tell = lift . tell
+    listen = listen
+    pass = pass
+
diff --git a/src/Text/LaTeX/LambdaTeX/Utils.hs b/src/Text/LaTeX/LambdaTeX/Utils.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Utils.hs
@@ -0,0 +1,14 @@
+-- | ΛTeX utilities
+module Text.LaTeX.LambdaTeX.Utils where
+
+import           Control.Exception
+import           System.Directory  (removeFile)
+import           System.IO.Error   (isDoesNotExistError)
+
+-- | Remove the given file if it exists
+removeIfExists :: FilePath -> IO ()
+removeIfExists fileName = removeFile fileName `catch` handleExists
+  where handleExists e
+          | isDoesNotExistError e = return ()
+          | otherwise = throwIO e
+
diff --git a/test/Spec.hs b/test/Spec.hs
new file mode 100644
--- /dev/null
+++ b/test/Spec.hs
@@ -0,0 +1,9 @@
+import           Control.Exception (evaluate)
+import           Test.Hspec
+import           Test.QuickCheck
+
+main :: IO ()
+main = hspec $ do
+    describe "unfinished test suite" $ do
+        it "is not finished yet, so here's a dummy test" $ do
+            True
