https://hal.archives-ouvertes.fr/hal-03060288 Contributor : Jean-François LemaitreConnect in order to contact the contributor Submitted on : Monday, December 14, 2020 - 3:09:08 PM Last modification on : Friday, August 27, 2021 - 4:32:02 PM Long-term archiving on: : Monday, March 15, 2021 - 6:34:00 PM