https://hal.archives-ouvertes.fr/hal-01955363 Contributor : Irène MestreConnect in order to contact the contributor Submitted on : Friday, December 14, 2018 - 12:08:30 PM Last modification on : Monday, June 27, 2022 - 3:02:25 AM Long-term archiving on: : Friday, March 15, 2019 - 4:09:44 PM