Hoang ST, Tran N. Studying optical spectral of Tb3+ and Sm3+ ions co – doped in alkali borate glasses. Dong Thap University Journal of Science [Internet]. 2023 Jun. 27 [cited 2024 Sep. 8];(33):77-80. Available from: https://dthujs.vn/index.php/dthujs/article/view/625