https://hal-univ-paris.archives-ouvertes.fr/hal-02293364 Contributor : Sylvie PatronConnect in order to contact the contributor Submitted on : Friday, September 20, 2019 - 6:12:21 PM Last modification on : Thursday, October 1, 2020 - 9:33:13 AM Long-term archiving on: : Sunday, February 9, 2020 - 4:33:07 AM