1. Department of Mathematics, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India
2. Université Française d′Egypte, Ismailia Desert Road, El Shorouk, Cairo, Egypt
3. Department of Mathematics and Engineering Physics, Faculty of Engineering, Mansoura University, Mansoura, Egypt
4. Department of Mathematics, Firat University, Elazig 23119, Turkey
5. Department of Medical Research, China Medical University, Taichung 40402, Taiwan
6. Faculty of Engineering Technology, Amol University of Special Modern Technologies, Iran
7. Department of Mathematics, Lafayette College, Easton, Pennsylvania, USA