1- Programme CAM-8 MIT Laboratory for Computer Science  Cambridge, MA 02139  http://www.im.lcs.mit.edu

 

2- Richard Kenyon http://topo.math.u-psud.fr/~kenyon/

 
 
 

3- A gauche,  A. Tonomura, Electron-holographic interference microscopy. Advances in Physics, 41(1):59-103,1992. A droite,  Stéphane Labbé http://www.math.u-psud.fr/~labbe/