Christophe Champetier

Kernels in some orientations of comparability graphs

Christophe Champetier, 1989, J. Comb. Theory, Ser. B.

On the null-homotopy of graphs

Christophe Champetier, 1987, Discret. Math..

Limit groups as limits of free groups

Vincent Guirardel, Christophe Champetier, C. Champetier, 2005 .