https://hal.ird.fr/ird-02934953 Contributor : Valéry RiddeConnect in order to contact the contributor Submitted on : Wednesday, September 9, 2020 - 8:27:26 PM Last modification on : Thursday, April 7, 2022 - 1:58:18 PM Long-term archiving on: : Thursday, December 3, 2020 - 1:14:58 AM