https://dumas.ccsd.cnrs.fr/dumas-00985559 Contributor : OSUG UGAConnect in order to contact the contributor Submitted on : Wednesday, April 30, 2014 - 9:37:31 AM Last modification on : Monday, July 20, 2020 - 3:05:57 PM Long-term archiving on: : Monday, April 10, 2017 - 5:42:20 PM