Son, T. Q. “REFINEMENTS OF $\VAREPSILON$-DUALITY THEOREMS FOR A NONCONVEX PROBLEM WITH AN INFINITE NUMBER OF CONSTRAINTS”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 4, no. 2 (July 7, 2013): 61–70. accessed October 13, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2703.