https://hal.univ-rennes2.fr/hal-01948758 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Saturday, December 8, 2018 - 12:59:49 PM Last modification on : Monday, December 13, 2021 - 12:02:14 PM Long-term archiving on: : Saturday, March 9, 2019 - 12:44:48 PM