https://hal-cnrs.archives-ouvertes.fr/hal-03479946 Contributor : Colette ORANGEConnect in order to contact the contributor Submitted on : Wednesday, January 19, 2022 - 9:03:32 AM Last modification on : Sunday, June 26, 2022 - 3:31:37 AM Long-term archiving on: : Wednesday, April 20, 2022 - 6:09:55 PM