https://cel.archives-ouvertes.fr/cel-00762830
Contributor : Xavier Guyon <>
Submitted on : Saturday, December 8, 2012 - 11:28:37 AM Last modification on : Tuesday, January 19, 2021 - 11:08:39 AM Long-term archiving on: : Saturday, March 9, 2013 - 2:55:10 AM