https://hal.inria.fr/hal-00880840 Contributor : Denis RoegelConnect in order to contact the contributor Submitted on : Wednesday, November 6, 2013 - 8:02:17 PM Last modification on : Saturday, October 16, 2021 - 11:26:09 AM Long-term archiving on: : Friday, February 7, 2014 - 10:25:20 AM