1. Department of Mathematics, Shanghai University, Shanghai, China
2. IT4Innovations, VSB – Technical University of Ostrava, Ostrava, Czech Republic
3. Department of Computer Science and Mathematics, Lebanese American University, Byblos, Lebanon
4. Faculty of Science, Jiangsu University, Zhenjiang, Jiangsu, People’s Republic of China
5. Department of Mathematics, Namal University, Mainwali, Pakistan