1. Department of Mathematics, Faculty of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
2. Department of Mathematics & Statistics, University of Swat, KPK, Pakistan
3. Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
4. Institute of Space Sciences, Magurele 077125 Bucharest, Romania
5. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
6. Centre for Plant Sciences & Biodiversity, University of Swat, Pakistan