https://halshs.archives-ouvertes.fr/halshs-02078148 Contributor : Sylvy JaglinConnect in order to contact the contributor Submitted on : Monday, March 25, 2019 - 10:02:40 AM Last modification on : Saturday, January 15, 2022 - 4:11:41 AM Long-term archiving on: : Wednesday, June 26, 2019 - 1:20:29 PM