1. Department of Mathematics and Computer Science, University of Science, Ho Chi Minh City, Vietnam
2. Vietnam National University, Ho Chi Minh City, Vietnam
3. Division of Applied Mathematics, Thu Dau Mot University, Binh Duong Province, Vietnam
4. School of Mathematics, Statistics and Applied Mathematics, National University of Ireland, Galway, Ireland
5. Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
6. Applied Analysis Research Group, Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam