https://hal.univ-rennes2.fr/hal-01692924 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Thursday, January 25, 2018 - 3:37:44 PM Last modification on : Monday, December 13, 2021 - 12:03:03 PM Long-term archiving on: : Friday, May 25, 2018 - 4:44:31 AM