https://hal.univ-lorraine.fr/hal-01733584 Contributor : Colette ORANGEConnect in order to contact the contributor Submitted on : Wednesday, March 14, 2018 - 3:58:29 PM Last modification on : Sunday, June 26, 2022 - 2:30:46 AM Long-term archiving on: : Wednesday, September 5, 2018 - 7:17:07 AM