IZMIRLIOGLU, Y.; ERDEM, E. Qualitative Reasoning About Cardinal Directions Using Answer Set Programming. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 32, n. 1, 2018. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/11568. Acesso em: 16 oct. 2021.