https://hal.inria.fr/inria-00551097 Contributor : Denis RoegelConnect in order to contact the contributor Submitted on : Sunday, January 2, 2011 - 3:42:17 PM Last modification on : Friday, February 26, 2021 - 3:28:08 PM Long-term archiving on: : Monday, November 5, 2012 - 3:05:49 PM