Zheng, Sen, and Renate Schmidt. “Deciding the Loosely Guarded Fragment and Querying Its Horn Fragment Using Resolution”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 03 (April 3, 2020): 3080–3087. Accessed May 14, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/5703.