https://hal.inria.fr/inria-00075589 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 6:33:01 PM Last modification on : Friday, February 4, 2022 - 3:21:59 AM Long-term archiving on: : Friday, May 13, 2011 - 1:22:05 PM