1. Mathematics Department, Northern Borders University, Arar, Saudi Arabia
2. Mathematics Department, University of Kairouan, Higher Institute of Applied Mathematics and Informatics, Kairouan, Tunisia
3. Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
4. Science and Technology for Defense Laboratory LR19DN01, Center for Military Research, Military Academy, Tunis, Tunisia
5. Military School of Aeronautical Specialities, Sfax, Tunisia
6. Mathematics Department, Faculty of Science of Sfax, University of Sfax, Sfax, Tunisia
7. Dipartimento di Matematica e Applicazioni, Università degli Studi di Milano-Bicocca, Milano, Italy