https://hal-amu.archives-ouvertes.fr/hal-01367740 Contributor : Boris BarraudConnect in order to contact the contributor Submitted on : Friday, September 16, 2016 - 3:50:32 PM Last modification on : Wednesday, November 3, 2021 - 9:38:24 AM Long-term archiving on: : Saturday, December 17, 2016 - 2:56:10 PM