https://hal-upec-upem.archives-ouvertes.fr/hal-01789127 Contributor : Georges LomnéConnect in order to contact the contributor Submitted on : Sunday, August 19, 2018 - 1:05:40 PM Last modification on : Saturday, January 15, 2022 - 4:17:41 AM Long-term archiving on: : Tuesday, November 20, 2018 - 12:25:15 PM