SULLIVAN ANDERSON, S.; CHARTRAND, G. The Lattice-Graph of the Topology of a Transitive Directed Graph. MATHEMATICA SCANDINAVICA, [S. l.], v. 21, p. 105–109, 1967. DOI: 10.7146/math.scand.a-10849. Disponível em: https://www.mscand.dk/article/view/10849. Acesso em: 5 may. 2024.