https://hal.univ-reims.fr/hal-01996917 Contributor : Laurence VoutquenneConnect in order to contact the contributor Submitted on : Wednesday, September 22, 2021 - 4:06:46 PM Last modification on : Tuesday, December 14, 2021 - 9:04:03 AM Long-term archiving on: : Thursday, December 23, 2021 - 7:01:19 PM