1. Department of Mathematics, University of Education Lahore, Multan, Pakistan
2. Centre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, Pakistan
3. Department of Mathematics & Statistics Institute of Southern Punjab, Multan, Pakistan
4. School of Mathematical Sciences, University of Science and Technology of China, Hefei, People's Republic of China
5. Department of Mechanical Engineering, Sejong University, Seoul, South Korea