https://dumas.ccsd.cnrs.fr/dumas-00690641 Contributor : ESPE LNFConnect in order to contact the contributor Submitted on : Tuesday, April 24, 2012 - 9:48:17 AM Last modification on : Wednesday, February 23, 2022 - 1:28:06 PM Long-term archiving on: : Wednesday, July 25, 2012 - 2:31:01 AM