1. Division of Applied Mathematics, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Vietnam
2. Faculty of Applied Technology, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
3. Department of Mathematics and Computer Science, University of Science, Ho Chi Minh City, Vietnam
4. Vietnam National University, Ho Chi Minh City, Vietnam
5. Faculty of Math, FPT University HCM, Saigon Hi-Tech Park, Thu Duc City, Ho Chi Minh City, Vietnam
6. College of Mathematical Sciences, Harbin Engineering University, Harbin 150001, China
7. Faculty of Applied Mathematics, AGH University of Science and Technology, 30-059 Kraków, Poland