https://hal.inria.fr/hal-00950050 Contributor : Christophe MorvanConnect in order to contact the contributor Submitted on : Thursday, February 20, 2014 - 3:59:15 PM Last modification on : Thursday, January 20, 2022 - 5:28:52 PM Long-term archiving on: : Tuesday, May 20, 2014 - 3:40:51 PM