1. CEM Lab, Department of Electrical Engineering, National School of Engineering; University of Sfax; Sfax Tunisia
2. Department of Mathematics, Faculty of Science; Benha University; Benha Egypt
3. Faculty of Science, Department of Mathematics; Kuwait University; Kuwait City Kuwait
4. Department of Mathematics, College of Science; Jouf University-Al Jouf; Sakakah Saudi Arabia
5. Department of Mathematics, Faculty of Sciences of Sfax; Sfax Tunisia