https://dumas.ccsd.cnrs.fr/dumas-00699974 Contributor : ESPE LNFConnect in order to contact the contributor Submitted on : Tuesday, May 22, 2012 - 10:01:08 AM Last modification on : Wednesday, February 23, 2022 - 1:28:06 PM Long-term archiving on: : Thursday, August 23, 2012 - 2:25:10 AM