https://hal.univ-rennes2.fr/hal-01635344 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Wednesday, November 15, 2017 - 9:46:56 AM Last modification on : Monday, December 13, 2021 - 12:02:13 PM Long-term archiving on: : Friday, February 16, 2018 - 12:38:05 PM