https://halshs.archives-ouvertes.fr/halshs-01994163 Contributor : Luc GwiazdzinskiConnect in order to contact the contributor Submitted on : Thursday, April 4, 2019 - 4:09:44 PM Last modification on : Saturday, June 25, 2022 - 8:04:22 PM Long-term archiving on: : Friday, July 5, 2019 - 12:16:09 PM