https://hal.inria.fr/inria-00076111 Contributor : Rapport De Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 8:00:04 PM Last modification on : Friday, February 4, 2022 - 3:21:57 AM Long-term archiving on: : Friday, May 13, 2011 - 6:16:45 PM