PIETRUSZCZAK, Andrzej. Some Additional Axioms for T-normal Logics. Defining K45, KB4, KD45 and S5 without Using Modal Rules. Bulletin of the Section of Logic, [S. l.], v. 53, n. 4, p. 511–533, 2024. DOI: 10.18778/0138-0680.2024.12. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/22813. Acesso em: 7 dec. 2025.