1. GRESPI EA 4694, Université de Reims, 51687 Reims Cedex 2, France
2. GSMA, UMR CNRS 7331, Université de Reims, 51687 Reims Cedex 2, France
3. Montclair State University, Center of Pedagogy. New Jersey, USA
4. Jérôme Lohez Scholarship Foundation 124 W 60th Street, NY 10023, USA