https://hal-cnrs.archives-ouvertes.fr/hal-03014540 Contributor : Patricia GIBERTConnect in order to contact the contributor Submitted on : Thursday, November 19, 2020 - 2:38:53 PM Last modification on : Tuesday, July 20, 2021 - 5:20:04 PM Long-term archiving on: : Saturday, February 20, 2021 - 7:58:32 PM