https://hal-lirmm.ccsd.cnrs.fr/lirmm-00269442 Contributor : Christine Carvalho De MatosConnect in order to contact the contributor Submitted on : Thursday, April 3, 2008 - 8:11:59 AM Last modification on : Friday, October 22, 2021 - 3:07:18 PM Long-term archiving on: : Thursday, May 20, 2010 - 9:30:52 PM