1. Department of Mathematics, COMSATS University Islamabad, Islamabad, Pakistan
2. Department of Mathematics, College of Science and Humanities in Alkharj, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia
3. Future Technology Research Center, National Yunlin University of Science and Technology, Douliou, Taiwan
4. Department of Mathematics, University of Wah, Rawalpindi, Pakistan