Introduction
Origin : Files produced by the author(s)
Françoise HEULOT-PETIT : Connect in order to contact the contributor
https://hal-univ-artois.archives-ouvertes.fr/hal-03183809
Submitted on : Monday, March 29, 2021-12:00:06 AM
Last modification on : Wednesday, October 20, 2021-9:58:20 AM
Long-term archiving on: Wednesday, June 30, 2021-6:04:55 PM