https://hal-cnrs.archives-ouvertes.fr/hal-03478885 Contributor : Colette ORANGEConnect in order to contact the contributor Submitted on : Wednesday, January 19, 2022 - 10:57:47 AM Last modification on : Tuesday, February 1, 2022 - 2:33:14 PM Long-term archiving on: : Wednesday, April 20, 2022 - 6:21:18 PM