https://hal-imt.archives-ouvertes.fr/hal-00479571 Contributor : Admin Télécom ParistechConnect in order to contact the contributor Submitted on : Friday, April 30, 2010 - 9:13:55 PM Last modification on : Friday, January 21, 2022 - 12:56:02 PM Long-term archiving on: : Thursday, September 30, 2010 - 4:18:07 PM