Affiliation: | 1. PSL, Université Paris-Dauphine, CNRS, LAMSADE UMR 7243, 75775 Paris Cedex 16, France.aloulou@lamsade.dauphine.fr;3. LIMOS UMR 6158 CNRS, Ecole des Mines de Saint-Etienne, Saint-Etienne 42023 Cedex 2, France.;4. United Institute of Informatics Problems, National Academy of Sciences of Belarus, Minsk, Belarus. |