https://hal-lirmm.ccsd.cnrs.fr/lirmm-00106614 Contributor : Christine Carvalho de MatosConnect in order to contact the contributor Submitted on : Monday, October 16, 2006 - 9:39:51 AM Last modification on : Friday, October 22, 2021 - 3:07:30 PM Long-term archiving on: : Tuesday, April 6, 2010 - 7:48:29 PM