https://hal.inria.fr/inria-00074995 Contributor : Rapport De Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 5:10:22 PM Last modification on : Friday, February 4, 2022 - 3:24:34 AM Long-term archiving on: : Tuesday, April 12, 2011 - 8:29:33 PM