https://hal.inria.fr/inria-00075148 Contributor : Rapport De Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 5:33:14 PM Last modification on : Friday, February 4, 2022 - 3:16:28 AM Long-term archiving on: : Sunday, April 4, 2010 - 9:47:09 PM