JONNSON, B. Algebras Whose Congruence Lattices are Distributive. MATHEMATICA SCANDINAVICA, [S. l.], v. 21, p. 110–121, 1967. DOI: 10.7146/math.scand.a-10850. Disponível em: https://www.mscand.dk/article/view/10850. Acesso em: 11 apr. 2025.