https://hal-sfo.ccsd.cnrs.fr/sfo-00999583 Contributor : Saïda GuellatiConnect in order to contact the contributor Submitted on : Tuesday, June 3, 2014 - 5:14:01 PM Last modification on : Thursday, April 28, 2022 - 4:25:34 PM Long-term archiving on: : Wednesday, September 3, 2014 - 12:41:20 PM