https://dumas.ccsd.cnrs.fr/dumas-00863896 Contributor : ESPE LNFConnect in order to contact the contributor Submitted on : Thursday, September 19, 2013 - 6:09:51 PM Last modification on : Wednesday, February 23, 2022 - 1:28:06 PM Long-term archiving on: : Friday, April 7, 2017 - 12:10:48 AM