https://dumas.ccsd.cnrs.fr/dumas-00986579 Contributor : OSUG UGAConnect in order to contact the contributor Submitted on : Friday, May 2, 2014 - 6:18:49 PM Last modification on : Monday, July 20, 2020 - 3:05:57 PM Long-term archiving on: : Monday, April 10, 2017 - 6:36:24 PM