https://cel.archives-ouvertes.fr/cel-00529505 Contributor : Arnaud LegoutConnect in order to contact the contributor Submitted on : Thursday, January 22, 2015 - 2:39:21 PM Last modification on : Thursday, February 24, 2022 - 3:34:03 PM Long-term archiving on: : Thursday, April 23, 2015 - 10:46:07 AM