https://cel.archives-ouvertes.fr/cel-00573977 Contributor : Pierre SaramitoConnect in order to contact the contributor Submitted on : Sunday, March 6, 2011 - 6:03:03 PM Last modification on : Thursday, December 2, 2021 - 9:02:08 PM Long-term archiving on: : Tuesday, June 7, 2011 - 2:30:11 AM