https://hal.inria.fr/inria-00070325 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Friday, May 19, 2006 - 8:07:07 PM Last modification on : Friday, February 4, 2022 - 3:19:52 AM Long-term archiving on: : Sunday, April 4, 2010 - 8:56:57 PM