https://hal.archives-ouvertes.fr/hal-00509860 Contributor : Adrien KasselConnect in order to contact the contributor Submitted on : Monday, August 16, 2010 - 9:37:23 PM Last modification on : Monday, March 21, 2022 - 2:54:02 PM Long-term archiving on: : Wednesday, November 17, 2010 - 2:56:12 AM