https://hal.univ-rennes2.fr/hal-01626275 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Monday, October 30, 2017 - 3:32:49 PM Last modification on : Monday, December 13, 2021 - 12:02:13 PM Long-term archiving on: : Wednesday, January 31, 2018 - 12:47:59 PM