Affiliation: | 1. Ecole Nationale des Sciences Appliquées (ENSA) de Khouribga, University Hassan 1st, Settat, Morocco;2. Labo. Modélisation Stochastique et Déterministe (LaMSD) and URAC 04, Department of Mathematics and Computer Science, Faculty of Sciences, University Mohamed 1st, Oujda, Morocco;3. Labo. Modélisation Stochastique et Déterministe (LaMSD) and URAC 04, Department of Mathematics and Computer Science, Faculty of Sciences, University Mohamed 1st, Oujda, Morocco |