https://hal.ird.fr/ird-02063958 Contributor : Emmanuel ParadisConnect in order to contact the contributor Submitted on : Monday, March 11, 2019 - 3:35:07 PM Last modification on : Thursday, May 19, 2022 - 3:44:13 PM Long-term archiving on: : Wednesday, June 12, 2019 - 6:47:34 PM