h ttp://www.univ-rouen.fr /LMRS/Persopa ge/Fernandez/

htt p://www.un ige.ch/math/folks/velenik/

ht tp://www-old. math.gatech.edu/~jeanbel/ (quantum)

htt p://www.m at.ufmg.br/~aldo/research.html (cluster expansion)

       Take off the spaces.

http://www.univ-rouen.fr/LMRS/Persopage/Fernandez/

http://www.unige.ch/math/folks/velenik/

http://www-old.math.gatech.edu/~jeanbel/ (quantum)

http://www.mat.ufmg.br/~aldo/research.html (cluster expansion)