Đinh, Diệu Hằng, and Văn Sự Trần. 2026. “Robust Duality Analysis for Efficiency via Convexificators in Nonsmooth Nonconvex Single - Objective Optimization Problems”. Thang Long Journal of Science: Mathematics and Mathematical Sciences 5 (1):59-74. https://science.thanglong.edu.vn/index.php/volc/article/view/332.