https://hal.univ-rennes2.fr/hal-02092362 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Monday, April 8, 2019 - 9:51:27 AM Last modification on : Monday, December 13, 2021 - 12:03:04 PM Long-term archiving on: : Wednesday, July 10, 2019 - 12:35:57 PM