https://hal.inria.fr/hal-01024662 Contributor : Estelle BouzatConnect in order to contact the contributor Submitted on : Wednesday, July 16, 2014 - 2:58:18 PM Last modification on : Friday, May 29, 2020 - 11:12:02 PM Long-term archiving on: : Monday, November 24, 2014 - 4:31:24 PM