https://hal.inria.fr/inria-00075497 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 6:20:44 PM Last modification on : Friday, February 4, 2022 - 3:15:23 AM Long-term archiving on: : Tuesday, April 12, 2011 - 11:22:58 PM