BELARDINELLI, F.; VAN DER HOEK, W. A Semantical Analysis of Second-Order Propositional Modal Logic. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 30, n. 1, 2016. DOI: 10.1609/aaai.v30i1.10100. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/10100. Acesso em: 3 may. 2024.