https://cel.archives-ouvertes.fr/cel-00725771 Contributor : Kévin Santugini RepiquetConnect in order to contact the contributor Submitted on : Monday, August 27, 2012 - 5:15:21 PM Last modification on : Wednesday, February 2, 2022 - 3:53:22 PM Long-term archiving on: : Wednesday, November 28, 2012 - 3:32:57 AM