https://hal-univ-rennes1.archives-ouvertes.fr/hal-01739956 Contributor : Laurent JonchèreConnect in order to contact the contributor Submitted on : Wednesday, January 20, 2021 - 1:35:44 PM Last modification on : Wednesday, March 30, 2022 - 2:38:21 PM Long-term archiving on: : Wednesday, April 21, 2021 - 6:36:04 PM