1. Department of Mathematics , Laboratory of Engineering Sciences and Energies, Faculté Polydisciplinaire de Ouarzazate , Université Ibn Zohr , Ouarzazate , Morocco
2. Faculté Polydisciplinaire de Khouribga , Université Sultan Moulay Slimane de Beni-Mellal , Khouribga , Morocco
3. Equipe de Recherche MATIC , Faculté Polydisciplinaire of Khouribga , Université Sultan Moulay Slimane de Beni-Mellal , Khouribga , Morocco