McIntyre, Stephanie, Alexander Borgida, David Toman, and Grant Weddell. “On Limited Conjunctions and Partial Features in Parameter-Tractable Feature Logics”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 2995-3002. Accessed July 7, 2022. https://ojs.aaai.org/index.php/AAAI/article/view/4156.