https://hal-normandie-univ.archives-ouvertes.fr/hal-03139435 Contributor : Brice Arsène MankouConnect in order to contact the contributor Submitted on : Thursday, February 11, 2021 - 11:33:29 PM Last modification on : Wednesday, March 2, 2022 - 5:06:02 PM Long-term archiving on: : Wednesday, May 12, 2021 - 7:20:38 PM