https://hal-sfo.ccsd.cnrs.fr/sfo-01132973 Contributor : Catherine HercéConnect in order to contact the contributor Submitted on : Wednesday, March 18, 2015 - 12:03:49 PM Last modification on : Monday, February 15, 2021 - 10:39:19 AM Long-term archiving on: : Monday, April 17, 2017 - 5:40:00 PM