https://hal-cnam.archives-ouvertes.fr/hal-02475001 Contributor : Gilbert SaportaConnect in order to contact the contributor Submitted on : Tuesday, February 11, 2020 - 5:18:34 PM Last modification on : Monday, February 21, 2022 - 3:38:18 PM Long-term archiving on: : Tuesday, May 12, 2020 - 5:11:33 PM