https://halshs.archives-ouvertes.fr/halshs-02055591 Contributor : Henri GALINIEConnect in order to contact the contributor Submitted on : Monday, March 4, 2019 - 10:14:43 AM Last modification on : Sunday, June 26, 2022 - 2:37:00 AM Long-term archiving on: : Wednesday, June 5, 2019 - 1:04:07 PM