https://hal.inria.fr/inria-00076073 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 7:54:51 PM Last modification on : Tuesday, May 3, 2022 - 4:48:02 PM Long-term archiving on: : Friday, May 13, 2011 - 1:22:54 PM