https://hal-sfo.ccsd.cnrs.fr/sfo-00383892 Contributor : Gérard RebmannConnect in order to contact the contributor Submitted on : Wednesday, May 13, 2009 - 5:13:25 PM Last modification on : Thursday, March 17, 2022 - 10:08:15 AM Long-term archiving on: : Thursday, June 10, 2010 - 11:07:23 PM