https://hal.inria.fr/inria-00074185 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 2:42:10 PM Last modification on : Thursday, February 3, 2022 - 11:18:55 AM Long-term archiving on: : Tuesday, April 12, 2011 - 3:52:50 PM