https://hal-amu.archives-ouvertes.fr/hal-02395678 Contributor : Nicole IsnardonConnect in order to contact the contributor Submitted on : Thursday, December 5, 2019 - 4:00:45 PM Last modification on : Tuesday, October 19, 2021 - 10:59:54 PM Long-term archiving on: : Friday, March 6, 2020 - 7:25:38 PM