https://hal.archives-ouvertes.fr/hal-00923024 Contributor : Fabrice VirgiliConnect in order to contact the contributor Submitted on : Thursday, January 16, 2014 - 7:00:06 AM Last modification on : Friday, April 29, 2022 - 10:12:12 AM Long-term archiving on: : Saturday, April 8, 2017 - 8:30:14 AM