https://dumas.ccsd.cnrs.fr/dumas-00695250 Contributor : ESPE LNFConnect in order to contact the contributor Submitted on : Monday, May 7, 2012 - 3:53:42 PM Last modification on : Wednesday, February 23, 2022 - 1:28:06 PM Long-term archiving on: : Wednesday, August 8, 2012 - 2:35:10 AM