https://hal.univ-rennes2.fr/hal-02419471 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Tuesday, January 14, 2020 - 12:03:34 PM Last modification on : Monday, December 13, 2021 - 12:03:04 PM Long-term archiving on: : Wednesday, April 15, 2020 - 12:36:57 PM