https://hal-ifp.archives-ouvertes.fr/hal-02475706 Contributor : Jean KittelConnect in order to contact the contributor Submitted on : Wednesday, February 12, 2020 - 11:24:16 AM Last modification on : Thursday, February 13, 2020 - 5:55:17 PM Long-term archiving on: : Wednesday, May 13, 2020 - 2:04:51 PM