1. Department of Mathemtics, Government College University Lahore (GCUL), Lahore 54000, Pakistan
2. Department of Mathematics, University of Gujrat, Gujrat, 50700, Pakistan
3. Department of Mathematics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
4. Department of Applied Mathematics, University Politehnica of Bucharest, 060042 Bucharest, Romania
5. Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
6. Fundamental Sciences Applied in Engineering Research Center (SFAI), University Politehnica of Bucharest, 060042 Bucharest, Romania