Paudyal, Rajendra, and Narayan Prasad Adhikari. “A Brief Summary on Lexicographic Network Flow Problem”. Journal of Advanced College of Engineering and Management 11, no. 1 (September 18, 2025): 305–316. Accessed February 9, 2026. https://www.nepjol.info/index.php/JACEM/article/view/84550.