https://hal.univ-lorraine.fr/hal-01898129 Contributor : Memoires UlConnect in order to contact the contributor Submitted on : Thursday, October 18, 2018 - 9:27:34 AM Last modification on : Thursday, October 18, 2018 - 2:26:50 PM Long-term archiving on: : Saturday, January 19, 2019 - 12:54:40 PM