https://hal.inria.fr/inria-00070068 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Friday, May 19, 2006 - 7:01:00 PM Last modification on : Friday, February 4, 2022 - 3:21:52 AM Long-term archiving on: : Monday, September 17, 2012 - 3:55:19 PM