https://cel.archives-ouvertes.fr/cel-00640928 Contributor : Sylvie FloresConnect in order to contact the contributor Submitted on : Monday, November 14, 2011 - 2:34:21 PM Last modification on : Monday, December 13, 2021 - 9:14:53 AM Long-term archiving on: : Wednesday, February 15, 2012 - 2:25:45 AM