https://hal.inria.fr/inria-00074373 Contributor : Rapport De Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 3:10:14 PM Last modification on : Thursday, February 3, 2022 - 11:18:57 AM Long-term archiving on: : Tuesday, April 12, 2011 - 4:46:44 PM