Elkind, Edith, Piotr Faliszewski, Martin Lackner, and Svetlana Obraztsova. “The Complexity of Recognizing Incomplete Single-Crossing Preferences”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 1 (February 16, 2015). Accessed April 23, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/9321.