https://hal-ifp.archives-ouvertes.fr/hal-02284090 Contributor : Pascale MallaretConnect in order to contact the contributor Submitted on : Wednesday, September 11, 2019 - 2:29:30 PM Last modification on : Monday, March 23, 2020 - 12:50:06 PM Long-term archiving on: : Friday, February 7, 2020 - 11:08:52 PM