1. Department of Mathematics, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
2. Department of Mathematics, University of South Australia, Adelaide, SA 5000, Australia
3. Department of Mathematics and Statistics, Women University Swabi, Swabi 23430, Pakistan
4. Marine Science Centre, University of Basrah, Basrah 61001, Iraq
5. Department of Mathematics, College of Education for Pure Sciences, University of Basrah, Basrah 61001, Iraq
6. Institute of Mathematics, University of Debrecen, Pf. 400, H-4002 Debrecen, Hungary
7. College of Engineering Technology, National University of Science and Technology, Nasiriyah 64001, Iraq
8. Department of Mathematics, Technical University of Cluj-Napoca, Str. Memorandumului nr. 28, 400114 Cluj-Napoca, Romania