https://hal.univ-reunion.fr/hal-02403796 Contributor : Réunion UnivConnect in order to contact the contributor Submitted on : Wednesday, December 11, 2019 - 6:15:29 AM Last modification on : Tuesday, October 19, 2021 - 5:56:00 PM Long-term archiving on: : Thursday, March 12, 2020 - 2:35:59 PM