1. Department of Mathematics, University of Sargodha, Sargodha, Pakistan
2. Department of Economics, Faculty of Economics, Administrative and Social Sciences, Hasan Kalyoncu University, TR-27410 Gaziantep, Turkey
3. Department of Mathematics, Shaheed Benazir Bhutto University, Sheringal, Pakistan
4. Department of Mathematics, College of Arts and Sciences, Prince Sattam Bin Abdulaziz University, Wadi Aldawaser 11991, Saudi Arabia