https://hal.inria.fr/inria-00075473 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 6:18:02 PM Last modification on : Friday, February 4, 2022 - 3:23:52 AM Long-term archiving on: : Monday, September 17, 2012 - 5:05:17 PM