https://dumas.ccsd.cnrs.fr/dumas-00697247 Contributor : ESPE LNFConnect in order to contact the contributor Submitted on : Tuesday, May 15, 2012 - 8:18:02 AM Last modification on : Wednesday, February 23, 2022 - 1:28:06 PM Long-term archiving on: : Thursday, August 16, 2012 - 2:25:14 AM