https://cel.archives-ouvertes.fr/cel-00556967 Contributor : Eric Goncalves da SilvaConnect in order to contact the contributor Submitted on : Tuesday, January 18, 2011 - 11:06:21 AM Last modification on : Wednesday, October 20, 2021 - 12:58:12 AM Long-term archiving on: : Tuesday, April 19, 2011 - 2:54:25 AM