1. Department of Mathematics, Governmant Post Graguate College Mardan, Mardan, Pakistan
2. Department of Mathematics, Bacha Khan University Charsadda, K.P.K Pakistan
3. Department of Mathematics, Capital University of Science and Technology, Islamabad, Pakistan
4. Center for Applied Mathematics and Bioinformatics, Department of Mathematics and Natural Sciences, Gulf University for Science and Technology, Hawally, Kuwait