https://cel.archives-ouvertes.fr/cel-00092969 Contributor : Administrateur De CELConnect in order to contact the contributor Submitted on : Tuesday, September 12, 2006 - 3:27:54 PM Last modification on : Saturday, June 25, 2022 - 10:57:34 PM Long-term archiving on: : Monday, April 5, 2010 - 11:39:15 PM