DZIK, W.; RADELECZKI, S. Preserving Filtering Unification by Adding Compatible Operations to Some Heyting Algebras. Bulletin of the Section of Logic, [S. l.], v. 45, n. 3/4, p. 257–267, 2016. DOI: 10.18778/0138-0680.45.3.4.08. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/1823. Acesso em: 3 may. 2024.