1. Department of Mathematics, University of Management and Technology, Lahore, Pakistan
2. Department of Mathematics and Statistics, The University of Lahore, Lahore, Pakistan
3. Department of Mathematics, Cankaya University, 06530, Balgat, Ankara, Turkey
4. ; Institute of Space Sciences, Magurele-Bucharest, Romania
5. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan, China
6. Faculty of Science, Department Mathematics, King Abdulaziz University, Jeddah, Saudi Arabia
7. Department of Mathematics, Lahore College for Women University, Lahore, Pakistan
8. Faculty of Engineering, University of Central Punjab, Lahore, Pakistan