https://halshs.archives-ouvertes.fr/halshs-01699193 Contributor : Nicolas LebourgConnect in order to contact the contributor Submitted on : Friday, February 2, 2018 - 10:24:41 AM Last modification on : Wednesday, November 3, 2021 - 7:11:00 AM Long-term archiving on: : Thursday, May 3, 2018 - 2:03:49 PM