https://hal.inria.fr/inria-00075888 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 7:32:21 PM Last modification on : Friday, February 4, 2022 - 3:22:04 AM Long-term archiving on: : Friday, May 13, 2011 - 4:10:51 PM