https://hal.inria.fr/hal-02508728 Contributor : Jean-Claude BermondConnect in order to contact the contributor Submitted on : Sunday, March 15, 2020 - 4:23:00 PM Last modification on : Sunday, June 26, 2022 - 12:13:56 PM Long-term archiving on: : Tuesday, June 16, 2020 - 6:34:14 PM