Maehara, Takanori, and Yuma Inoue. “Group Decision Diagram (GDD): A Compact Representation for Permutations”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 2986–2994. Accessed July 26, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/4155.