1. School of Mathematics, Minhaj University Lahore, Lahore, Pakistan
2. Department of Mathematics, Gazi University, D G Khan, Pakistan
3. Department of Mathematics, The Islamia University, Bahawalpur, Pakistan
4. Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
5. Art and Science Faculty, Department of Mathematics, Siirt University, Siirt, Turkey
6. Department of Mathematics, Ghazni University, Ghazni, Afganistan