https://hal.univ-rennes2.fr/hal-02292698 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Friday, September 20, 2019 - 10:09:42 AM Last modification on : Monday, December 13, 2021 - 12:02:13 PM Long-term archiving on: : Sunday, February 9, 2020 - 2:40:03 AM