CALÌ, A.; GOTTLOB, G.; PIERIS, A. New Expressive Languages for Ontological Query Answering. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 25, n. 1, p. 1541-1546, 2011. DOI: 10.1609/aaai.v25i1.7957. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/7957. Acesso em: 25 apr. 2024.