https://hal-amu.archives-ouvertes.fr/hal-01434138 Contributor : Élodie AttiaConnect in order to contact the contributor Submitted on : Friday, January 13, 2017 - 10:57:41 AM Last modification on : Wednesday, January 18, 2017 - 1:05:42 AM Long-term archiving on: : Friday, April 14, 2017 - 2:57:38 PM