https://hal.inria.fr/inria-00074397 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 3:13:13 PM Last modification on : Friday, February 4, 2022 - 3:17:26 AM Long-term archiving on: : Monday, April 5, 2010 - 12:09:09 AM