https://hal.univ-rennes2.fr/hal-01775183 Contributor : Laurence LerouxConnect in order to contact the contributor Submitted on : Tuesday, April 24, 2018 - 1:54:11 PM Last modification on : Monday, December 13, 2021 - 12:03:01 PM Long-term archiving on: : Wednesday, September 19, 2018 - 9:18:16 AM