https://hal.univ-brest.fr/hal-01078439 Contributor : Vincent RibaudConnect in order to contact the contributor Submitted on : Wednesday, October 29, 2014 - 8:12:58 AM Last modification on : Monday, March 14, 2022 - 11:08:08 AM Long-term archiving on: : Friday, January 30, 2015 - 10:11:47 AM