https://cel.archives-ouvertes.fr/cel-00797596 Contributor : Adrien Vogt-SchilbConnect in order to contact the contributor Submitted on : Wednesday, March 6, 2013 - 4:38:11 PM Last modification on : Friday, October 8, 2021 - 4:26:40 PM Long-term archiving on: : Friday, June 7, 2013 - 4:25:09 AM