https://hal.inria.fr/inria-00075040 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 5:19:10 PM Last modification on : Friday, February 4, 2022 - 3:15:07 AM Long-term archiving on: : Tuesday, April 12, 2011 - 5:56:54 PM