Kabadi, S. N., R. Chandrasekaran, and K. P.K. Nair. “2-Commodity Integer Network Synthesis Problem”. Algorithmic Operations Research 4, no. 2 (September 16, 2009): Pages 117 – 132. Accessed November 21, 2024. https://journals.lib.unb.ca/index.php/AOR/article/view/12477.