https://cel.archives-ouvertes.fr/cel-00972617 Contributor : Renaud SavalleConnect in order to contact the contributor Submitted on : Thursday, April 3, 2014 - 5:41:33 PM Last modification on : Wednesday, November 17, 2021 - 12:30:15 PM Long-term archiving on: : Thursday, July 3, 2014 - 6:41:07 PM