https://hal.inria.fr/hal-00880845 Contributor : Denis RoegelConnect in order to contact the contributor Submitted on : Wednesday, November 6, 2013 - 8:06:26 PM Last modification on : Saturday, October 16, 2021 - 11:26:09 AM Long-term archiving on: : Friday, April 7, 2017 - 10:18:08 PM