1. Faculty of Mathematical Economics, National Economics University, Hanoi City, Vietnam
2. Faculty of Mathematical Economics, National Economics University, Hanoi, Vietnam
3. School of Mathematics and Statistics, Shandong University of Technology, Shandong, People's Republic of China
4. Tianjin Key Laboratory for Advanced Signal Processing and College of Science, Civil Aviation University of China, Tianjin, People's Republic of China
5. Department of Mathematics Education and the RINS, Gyeongsang National University, Jinju, Korea