https://hal-univ-artois.archives-ouvertes.fr/hal-01248239
Contributor : Stéphane Callens <>
Submitted on : Thursday, December 24, 2015 - 9:59:49 AM Last modification on : Friday, February 22, 2019 - 1:26:33 AM Long-term archiving on: : Friday, March 25, 2016 - 11:42:20 AM