Cima, Gianluca, Marco Console, Roberto Maria Delfino, Maurizio Lenzerini, and Antonella Poggi. “Answering Conjunctive Queries With Safe Negation and Inequalities over RDFS Knowledge Bases”. Proceedings of the AAAI Conference on Artificial Intelligence 39, no. 14 (April 11, 2025): 14824–14831. Accessed May 14, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/33625.