https://hal.inria.fr/inria-00072995 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 11:32:24 AM Last modification on : Thursday, February 3, 2022 - 11:18:26 AM Long-term archiving on: : Thursday, March 24, 2011 - 12:23:59 PM