https://hal.archives-ouvertes.fr/hal-01567276 Contributor : Catherine GarbayConnect in order to contact the contributor Submitted on : Thursday, February 15, 2018 - 5:54:29 PM Last modification on : Wednesday, March 2, 2022 - 10:10:11 AM Long-term archiving on: : Monday, May 7, 2018 - 4:28:48 AM