1. Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan
2. Department of Basic Sciences, University of Engineering and Technology, Taxila, Pakistan
3. Department of Computer Science, National University of Modern Languages, H-9, Islamabad, Pakistan
4. Mathematics and its Applications in Life Sciences Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
5. Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam