diff --git a/resistor-cube.cabal b/resistor-cube.cabal
--- a/resistor-cube.cabal
+++ b/resistor-cube.cabal
@@ -1,5 +1,5 @@
 Name:                resistor-cube
-Version:             0.0.0.2
+Version:             0.0.0.3
 Synopsis:            Compute total resistance of a cube of resistors
 Description:
   This is an example of how to compute the total resistance
@@ -7,6 +7,8 @@
   It demonstrates how to build the necessary matrix.
   The computed voltages and currents
   are elements of the null vector of that matrix.
+  .
+  For a generalized version see the tests of the @linear-circuit@ package.
 Homepage:            http://hub.darcs.net/thielema/resistor-cube
 License:             BSD3
 License-File:        LICENSE
@@ -17,7 +19,7 @@
 Cabal-Version:       >=1.10
 
 Source-Repository this
-  Tag:         0.0.0.2
+  Tag:         0.0.0.3
   Type:        darcs
   Location:    http://hub.darcs.net/thielema/resistor-cube
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -66,6 +66,7 @@
 sourceCorner = Corner C0 C0 C0
 destCorner = Corner C1 C1 C1
 
+-- almost transposed voltageMatrix with some removed rows
 currentMatrix :: Matrix Double
 currentMatrix =
    Matrix.fromLists $