https://hal.archives-ouvertes.fr/hal-01018478 Contributor : Minh Ha-DuongConnect in order to contact the contributor Submitted on : Monday, July 21, 2014 - 2:29:10 PM Last modification on : Wednesday, April 6, 2022 - 3:12:07 PM Long-term archiving on: : Monday, November 24, 2014 - 9:06:00 PM