https://hal.inria.fr/inria-00074517 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 3:35:20 PM Last modification on : Friday, February 4, 2022 - 3:07:27 AM Long-term archiving on: : Sunday, April 4, 2010 - 10:18:53 PM