https://hal-amu.archives-ouvertes.fr/hal-02929251 Contributor : Nicole ISNARDONConnect in order to contact the contributor Submitted on : Thursday, September 3, 2020 - 12:03:00 PM Last modification on : Wednesday, November 3, 2021 - 4:02:54 AM Long-term archiving on: : Wednesday, December 2, 2020 - 6:19:50 PM