WALICKI, Michał. Paradoxes versus Contradictions in Logic of Sentential Operators. Logic and Logical Philosophy, [S. l.], v. 34, n. 4, p. 631–674, 2024. DOI: 10.12775/LLP.2024.002. Disponível em: https://apcz.umk.pl/LLP/article/view/43722. Acesso em: 23 dec. 2025.