1. Department of Mathematics, Mirpur University of Science and Technology, Mirpur, 10250 (AJK), Pakistan
2. Mathematics Department, Faculty of science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
3. Department of Mathematics, Cankaya University, Ankara, Turkey
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
5. Department of Mathematics, Institute of Space Sciences, 077125 Magurele, Romania