( R.Langevin Décembre 1998) (postcript version)
(R.Langevin 2011) (pdf version)
(C.Bonatti V.Grines and R. Langevin March 15 2001) (postcript version)
R. Langevin, July 2004 (postcript version)
The geometry of canal surfaces and the length of curves in de Sitter space
Rémi Langevin and Gil Solanes, June 2009(pdf version)
Rémi Langevin and Jun O'Hara, March 2008 (pdf version)
Canal foliations of S3
Rémi Langevin and Pawel Walczak, March 2009 (pdf version)
Dynamical behaviour of Darboux curve
Ronaldo Garcia, Rémi Langevin and Pawel Walczak, July 2009 (pdf version)
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