https://hal.inria.fr/inria-00076132 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 8:04:29 PM Last modification on : Friday, February 4, 2022 - 3:18:24 AM Long-term archiving on: : Friday, May 13, 2011 - 6:26:37 PM