JÓNSSON, B. On the representation of lattices. MATHEMATICA SCANDINAVICA, [S. l.], v. 1, p. 193–206, 1953. DOI: 10.7146/math.scand.a-10377. Disponível em: https://www.mscand.dk/article/view/10377. Acesso em: 3 may. 2024.