Ngọc, Phạm Lê, Nguyen Tung, and Nguyen Nghia. “The Second-Order Composed Radial Derivatives of Perturbation Mappings of Parametric Set-Valued Optimization Problems”. VNUHCM Journal of Advanced Research in Natural Sciences 4, no. 3 (July 1, 2020): 567-572. Accessed April 7, 2026. https://arns.vnuhcmjournal.com.vn/index.php/arns/article/view/838.