BLANCO, J. M. EF4, EF4-M and EF4-Ł: A companion to BN4 and two modal four-valued systems without strong Łukasiewicz-type modal paradoxes. Logic and Logical Philosophy, [S. l.], v. 31, n. 1, p. 75–104, 2021. DOI: 10.12775/LLP.2021.010. Disponível em: https://apcz.umk.pl/LLP/article/view/32704. Acesso em: 28 may. 2024.