1. Laboratory of Mathematics, Geometry, Analysis, Control and Applications, Tahar Moulay University of Saïda, P. O. Box 138 EN-Nasr 20000 Saïda, Algeria
2. Laboratory of Mathematics, Djillali Liabes University of Sidi Bel-Abbès, P. O. Box 89 Sidi Bel-Abbès 22000, Algeria
3. Department of Mathematics, Faculty of Science, Damanhour University, Damanhour, Egypt