https://cel.archives-ouvertes.fr/hal-02950782 Contributor : Christine TassonConnect in order to contact the contributor Submitted on : Monday, September 28, 2020 - 11:53:14 AM Last modification on : Saturday, June 25, 2022 - 9:03:32 PM Long-term archiving on: : Thursday, December 3, 2020 - 7:41:41 PM