Stefanoni, Giorgio, and Boris Motik. “Answering Conjunctive Queries over EL Knowledge Bases With Transitive and Reflexive Roles”. Proceedings of the AAAI Conference on Artificial Intelligence 29, no. 1 (February 18, 2015). Accessed April 19, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/9386.