Luong, N.
(2006).
 One result of the cyclic inequality.
<em>VNU Journal Of Science: Mathematics - Physics, 22</em>(3).
Retrieved from <a href="https://js.vnu.edu.vn/MaP/article/view/2800" target="_new">https://js.vnu.edu.vn/MaP/article/view/2800</a>