https://hal.inria.fr/hal-01392824 Contributor : Laurence DanlosConnect in order to contact the contributor Submitted on : Friday, November 4, 2016 - 6:13:46 PM Last modification on : Friday, March 27, 2020 - 3:46:46 AM Long-term archiving on: : Sunday, February 5, 2017 - 2:35:17 PM