Nguyen THL, Nguyen QV. The psychological state of 15-17 year-old male athletes of Ho Chi Minh City Vovinam team before competition. Dong Thap University Journal of Science [Internet]. 2016 Oct. 22 [cited 2024 Jun. 28];(22):40-6. Available from: https://dthujs.vn/index.php/dthujs/article/view/756