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.], p. 23 pp., 2024. DOI: 10.18778/0138-0680.2024.12. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/22813. Acesso em: 22 jul. 2024.