PYNKO, A. P. Four-valued expansions of Dunn-Belnap’s logic (I): Basic characterizations. Bulletin of the Section of Logic, [S. l.], v. 49, n. 4, p. 401–437, 2020. DOI: 10.18778/0138-0680.2020.19. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/8168. Acesso em: 29 apr. 2024.