AYALA, R.; DOMINGUEZ, E.; MÁRQUEZ, A. On the Graphs which are the Edge of a Plane Tiling. Mathematica Scandinavica, Berkeley, CA, United States, v. 77, p. 5–16, 1995. DOI: 10.7146/math.scand.a-12545. Disponível em: https://journals.msp.org/mscand/article/view/1127. Acesso em: 25 jul. 2026.