1. Department of Mathematics, University of Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan
2. College of Engineering and Technology, American University of the Middle East, Kuwait
3. Department of Electrical and Electronics Engineering, University of Turkish Aeronautical Association, Ankara, Turkey
4. Department of Mathematics, University of Malakand, Dir(L), Khyber Pakhtunkhwa, Pakistan