1. Electrical Engineering Department, University of Engineering and Technology, Taxila, Pakistan
2. Electrical Engineering Department, Engineering Institute of Technology, Perth, Western Australia, Australia
3. Art and Science Faculty, Department of Mathematics, Siirt University, Siirt, Turkey
4. Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
5. Department of Basic Sciences and Humanities, National University of Sciences and Technology, Islamabad, Pakistan
6. Department of Mathematics, Ghazni University, Ghazni, Afghanistan