1. Department of Mathematics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
2. Department of Science & High Technology, University of Insubria, Via Valleggio, Como, Italy + Department of Information Technology, Division of Scientific Computing, Uppsala University, L Gerhyddsv. Hus, Uppsala, Sweden
3. Department of Mathematics, University Center for Research & Developement, Chandigarh University, Mohali, Punjab, India
4. School of Information & Physical Sciences, The University of Newcastle, University Drive, Callaghan, Australia