https://hal-cnrs.archives-ouvertes.fr/hal-03434520 Contributor : Robert FeilConnect in order to contact the contributor Submitted on : Thursday, November 18, 2021 - 12:34:34 PM Last modification on : Tuesday, May 17, 2022 - 2:20:03 PM Long-term archiving on: : Saturday, February 19, 2022 - 6:57:51 PM