https://hal.inria.fr/inria-00073996 Contributor : Rapport de Recherche InriaConnect in order to contact the contributor Submitted on : Wednesday, May 24, 2006 - 2:15:57 PM Last modification on : Thursday, February 3, 2022 - 11:14:57 AM Long-term archiving on: : Thursday, March 24, 2011 - 1:43:06 PM