https://hal.archives-ouvertes.fr/hal-01804914 Contributor : Isabelle CeletConnect in order to contact the contributor Submitted on : Wednesday, July 11, 2018 - 5:10:04 PM Last modification on : Tuesday, April 12, 2022 - 4:12:03 PM Long-term archiving on: : Monday, October 1, 2018 - 7:46:59 AM