https://cel.archives-ouvertes.fr/cel-00092942 Contributor : Administrateur de CelConnect in order to contact the contributor Submitted on : Tuesday, September 12, 2006 - 3:25:26 PM Last modification on : Wednesday, November 10, 2021 - 5:38:03 PM Long-term archiving on: : Monday, April 5, 2010 - 11:38:23 PM