https://halshs.archives-ouvertes.fr/halshs-03312131 Contributor : Alain BurlaudConnect in order to contact the contributor Submitted on : Monday, February 14, 2022 - 5:13:11 PM Last modification on : Tuesday, February 22, 2022 - 5:07:53 PM Long-term archiving on: : Sunday, May 15, 2022 - 6:03:42 PM