https://cel.archives-ouvertes.fr/cel-00544132 Contributor : Arnaud LegoutConnect in order to contact the contributor Submitted on : Friday, January 6, 2012 - 1:45:55 PM Last modification on : Thursday, February 24, 2022 - 3:34:03 PM Long-term archiving on: : Saturday, April 7, 2012 - 2:46:16 AM