https://hal-amu.archives-ouvertes.fr/hal-02966028 Contributor : Olivier PoirotConnect in order to contact the contributor Submitted on : Tuesday, October 13, 2020 - 4:51:33 PM Last modification on : Wednesday, November 3, 2021 - 6:28:40 AM Long-term archiving on: : Thursday, January 14, 2021 - 7:42:54 PM