Vo, Ngoc Thanh, Duc Quoc Huynh, Trung Kien Nguyen, Hong Hai Ly, and Thi Cam Thuy Trinh. 2018. “Inverse Version of the Kth Maximization Combinatorial Optimization Problem”. CTU Journal of Innovation and Sustainable Development 54 (09):72-76. https://doi.org/10.22144/ctu.jen.2018.027.