https://dumas.ccsd.cnrs.fr/dumas-00976051 Contributor : OSUG UGAConnect in order to contact the contributor Submitted on : Wednesday, April 9, 2014 - 3:22:48 PM Last modification on : Monday, July 20, 2020 - 3:05:57 PM Long-term archiving on: : Monday, April 10, 2017 - 11:39:54 AM