WALENDZIAK, A. Deductive systems of pseudo-M algebras. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 21, p. 93–116, 2022. Disponível em: https://studmath.uken.krakow.pl/article/view/9650. Acesso em: 5 may. 2024.