Nhan, Tran Hoai Ngoc, Kien Trung Nguyen, Nguyen Thanh Hung, and Nguyen Thanh Toan. “ The Inverse K-Max Combinatorial Optimization Problem”. Yugoslav Journal of Operations Research 33, no. 2 (December 28, 2022): 309–322. Accessed January 26, 2026. https://yujor.erc.fon.bg.ac.rs/index.php/yujor/article/view/737.