Brewka, Gerhard, Miroslaw Truszczynski, and Stefan Woltran. “Representing Preferences Among Sets”. Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 3, 2010): 273–278. Accessed May 21, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/7584.