1. College of Natural Science, Can Tho University, Can Tho City, Vietnam
2. Laboratory for Applied and Industrial Mathematics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Vietnam
3. Faculty of Fundamental Sciences, Van Lang University, Ho Chi Minh City, Vietnam
4. Applied Analysis Research Group, Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam