https://cel.archives-ouvertes.fr/cel-00092947 Contributor : Administrateur de CelConnect in order to contact the contributor Submitted on : Tuesday, September 12, 2006 - 3:25:47 PM Last modification on : Thursday, March 17, 2022 - 10:08:09 AM Long-term archiving on: : Friday, May 13, 2011 - 11:49:44 PM