https://cel.archives-ouvertes.fr/cel-00136497
Contributor : Emmanuel Moulay <>
Submitted on : Wednesday, March 14, 2007 - 11:14:55 AM Last modification on : Tuesday, December 22, 2020 - 7:04:02 AM Long-term archiving on: : Friday, September 21, 2012 - 12:55:15 PM