https://hal.archives-ouvertes.fr/hal-01189921 Contributor : Archive Ouverte ProdInraConnect in order to contact the contributor Submitted on : Tuesday, September 1, 2015 - 1:10:08 PM Last modification on : Wednesday, March 23, 2022 - 12:08:18 PM Long-term archiving on: : Wednesday, April 26, 2017 - 11:45:52 AM