https://hal.inria.fr/inria-00074215 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 2:47:28 PM Last modification on : Friday, February 4, 2022 - 3:07:27 AM Long-term archiving on: : Tuesday, April 12, 2011 - 4:04:55 PM