https://hal.inria.fr/inria-00172050 Contributor : Radu StateConnect in order to contact the contributor Submitted on : Monday, November 12, 2007 - 10:48:24 AM Last modification on : Wednesday, February 2, 2022 - 3:51:48 PM Long-term archiving on: : Monday, September 24, 2012 - 12:25:16 PM