https://hal.inria.fr/inria-00070060 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Friday, May 19, 2006 - 6:57:38 PM Last modification on : Friday, February 4, 2022 - 3:19:31 AM Long-term archiving on: : Tuesday, February 22, 2011 - 11:13:21 AM