https://hal.inria.fr/inria-00107539 Contributor : Publications LoriaConnect in order to contact the contributor Submitted on : Thursday, October 19, 2006 - 9:00:38 AM Last modification on : Friday, February 26, 2021 - 3:28:08 PM Long-term archiving on: : Friday, November 25, 2016 - 12:26:14 PM