Nguyen TTL, Tran LN, Phan TH. Solving some elementary geometrical problems by Euclidean geometry’s methods. Dong Thap University Journal of Science [Internet]. 2023 Apr. 12 [cited 2024 Sep. 8];12(3):65-71. Available from: https://dthujs.vn/index.php/dthujs/article/view/1281