Nguyen, Van-Tuyen, and Thi-Yen Nguyen. “On the Second-Order Sufficient Optimality Condition in Nonconvex Multiobjective Optimization Problems”. HPU2 Journal of Science: Natural Sciences and Technology 3, no. 3 (December 30, 2024): 60–69. Accessed January 7, 2025. http://sj.hpu2.edu.vn/index.php/journal/article/view/264.