1. Faculty of Applied Sciences, University of Technical Education, Ho Chi Minh City, Vietnam
2. Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3. Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Department of Mathematics, University of Pedagogy Ho Chi Minh City, Vietnam