https://cel.archives-ouvertes.fr/cel-00092951 Contributor : Administrateur de CelConnect in order to contact the contributor Submitted on : Tuesday, September 12, 2006 - 3:26:29 PM Last modification on : Thursday, March 17, 2022 - 10:08:09 AM Long-term archiving on: : Monday, April 5, 2010 - 10:50:40 PM