https://hal.univ-rennes2.fr/hal-01728339 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Tuesday, September 4, 2018 - 7:49:33 AM Last modification on : Friday, February 11, 2022 - 2:30:05 PM Long-term archiving on: : Wednesday, December 5, 2018 - 12:35:09 PM