https://cel.archives-ouvertes.fr/inria-00001232 Contributor : Olivier ZendraConnect in order to contact the contributor Submitted on : Tuesday, April 11, 2006 - 9:53:15 AM Last modification on : Friday, February 4, 2022 - 3:21:44 AM Long-term archiving on: : Monday, September 17, 2012 - 1:30:35 PM