https://hal.inria.fr/inria-00074438 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 3:17:49 PM Last modification on : Friday, February 4, 2022 - 3:18:28 AM Long-term archiving on: : Monday, April 5, 2010 - 12:10:14 AM