https://hal-univ-artois.archives-ouvertes.fr/hal-01247873
Contributor : Stéphane Callens <>
Submitted on : Wednesday, December 23, 2015 - 4:19:54 PM Last modification on : Friday, February 22, 2019 - 1:26:33 AM Long-term archiving on: : Thursday, March 24, 2016 - 11:10:46 AM