https://hal.univ-rennes2.fr/hal-01637551 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Friday, November 17, 2017 - 4:02:16 PM Last modification on : Monday, December 13, 2021 - 12:02:13 PM Long-term archiving on: : Sunday, February 18, 2018 - 5:08:58 PM