Pham TTC, Vo DT, Ngo TKY, Tran THY. Procedures to build some inequality problems from basic convex functions. Tạp chí Khoa học Đại học Đồng Tháp [Internet]. 2022 Aug. 11 [cited 2026 Aug. 13];11(4):33-40. Available from: https://dthujs.vn/index.php/dthujs/article/view/201