https://hal-amu.archives-ouvertes.fr/hal-02480740 Contributor : Pierre MullerConnect in order to contact the contributor Submitted on : Monday, October 26, 2020 - 8:05:58 AM Last modification on : Wednesday, November 3, 2021 - 5:51:43 AM Long-term archiving on: : Wednesday, January 27, 2021 - 6:00:59 PM