1. Department of Physics
2. University of Education
3. Hue University
4. Hue City
5. Vietnam
6. Faculty of Natural Sciences Pedagogy
7. Sai Gon University
8. Ho Chi Minh City
9. Division of Theoretical Physics
10. Dong Thap University
11. Cao Lanh 870000
12. Quang Tri College of Teacher Training
13. Quang Tri Province