https://hal.inria.fr/inria-00076123 Contributor : Rapport De Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 8:02:35 PM Last modification on : Friday, February 4, 2022 - 3:22:54 AM Long-term archiving on: : Friday, May 13, 2011 - 2:07:58 PM