https://hal.inria.fr/inria-00075665 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 6:46:07 PM Last modification on : Friday, February 4, 2022 - 3:17:12 AM Long-term archiving on: : Monday, September 17, 2012 - 5:15:38 PM