PHẠM VĂN, Quốc. Cyclic Inequality Forms with Power 1/2,1/3. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 33, n. 3, sep. 2017. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/4209>. Date accessed: 23 dec. 2024. doi: https://doi.org/10.25073/2588-1124/vnumap.4209.