1. Department of Mathematics, Division of Science and Technology, University of Education, Lahore 54770, Pakistan
2. Department of Mathematics, Government College University, Katchery Road, Lahore 54000, Pakistan
3. Abdus Salam School of Mathematical Sciences, Government College University, Lahore 54600, Pakistan
4. Center for Mathematical Research, University of Sanya, Sanya 572022, China
5. Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Beograd, Serbia