https://dumas.ccsd.cnrs.fr/dumas-00978758 Contributor : OSUG UGAConnect in order to contact the contributor Submitted on : Monday, April 14, 2014 - 4:21:45 PM Last modification on : Monday, July 20, 2020 - 3:05:57 PM Long-term archiving on: : Monday, April 10, 2017 - 1:03:27 PM