https://hal.inria.fr/inria-00077181 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Monday, May 29, 2006 - 5:14:39 PM Last modification on : Friday, February 4, 2022 - 3:19:49 AM Long-term archiving on: : Friday, May 13, 2011 - 10:46:15 PM