1. Department of Mathematics, Government Superior Science College Peshawar, Peshawar, Pakistan
2. Department of Mathematics, Bacha Khan University, Charsadda, Pakistan
3. Department of Mathematics, City University of Science and Information Technology, Peshawar, Pakistan
4. College of Civil Engineering, National University of Sciences and Technology, Islamabad, Pakistan
5. Department of Basic Science and Islamiyat, University of Engineering and Technology, Peshawar, Pakistan