https://hal.univ-lorraine.fr/hal-01733816 Contributor : Colette OrangeConnect in order to contact the contributor Submitted on : Wednesday, March 14, 2018 - 4:10:06 PM Last modification on : Friday, May 1, 2020 - 3:50:50 PM Long-term archiving on: : Wednesday, September 5, 2018 - 7:48:32 AM