https://hal-amu.archives-ouvertes.fr/hal-03222546 Contributor : Jean-Michel DurafourConnect in order to contact the contributor Submitted on : Monday, May 10, 2021 - 12:19:57 PM Last modification on : Wednesday, November 3, 2021 - 7:30:20 AM Long-term archiving on: : Wednesday, August 11, 2021 - 7:19:44 PM