https://halshs.archives-ouvertes.fr/halshs-01685183 Contributor : Jean-Christophe AngautConnect in order to contact the contributor Submitted on : Tuesday, January 16, 2018 - 10:52:57 AM Last modification on : Tuesday, March 23, 2021 - 1:52:03 PM Long-term archiving on: : Monday, May 7, 2018 - 12:42:44 PM