https://dumas.ccsd.cnrs.fr/dumas-00979035 Contributor : OSUG UGAConnect in order to contact the contributor Submitted on : Tuesday, April 15, 2014 - 11:07:08 AM Last modification on : Monday, July 20, 2020 - 3:05:57 PM Long-term archiving on: : Monday, April 10, 2017 - 1:16:46 PM