https://hal-univ-tlse2.archives-ouvertes.fr/hal-01897460 Contributor : Martine GUIBERTConnect in order to contact the contributor Submitted on : Wednesday, October 17, 2018 - 11:25:53 AM Last modification on : Monday, July 4, 2022 - 9:10:13 AM Long-term archiving on: : Friday, January 18, 2019 - 1:37:42 PM