https://hal-normandie-univ.archives-ouvertes.fr/hal-03188804 Contributor : Brice Arsène MankouConnect in order to contact the contributor Submitted on : Wednesday, July 21, 2021 - 11:20:18 AM Last modification on : Wednesday, March 2, 2022 - 5:06:02 PM Long-term archiving on: : Friday, October 22, 2021 - 6:02:14 PM