By: Nicolas Schoeni, Wes Hardaker and Gervais Chapuis
At: The Swiss Federal Institute of Technology (EPFL), Switzerland
Copyright 1996 - 2005 by Gervais Chapuis, Nicolas Schoeni & Wes Hardaker and the EPFL, Lausanne, Switzerland. All rights reserved.
http://escher.epfl.ch/escher/
Some Samples