WALICKI, M. Modalities as interactions between the classical and the intuitionistic logics. Logic and Logical Philosophy, [S. l.], v. 15, n. 3, p. 193–215, 2007. DOI: 10.12775/LLP.2006.012. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2006.012. Acesso em: 21 may. 2024.