https://hal-hprints.archives-ouvertes.fr/hprints-00276871 Contributor : Emilie Wieth-KnudsenConnect in order to contact the contributor Submitted on : Wednesday, July 30, 2008 - 3:23:11 PM Last modification on : Wednesday, June 12, 2019 - 3:30:03 PM Long-term archiving on: : Saturday, November 26, 2016 - 1:23:41 AM