AGNARSSON, G. On chordal graphs and their chromatic polynomials. MATHEMATICA SCANDINAVICA, [S. l.], v. 93, n. 2, p. 240–246, 2003. DOI: 10.7146/math.scand.a-14421. Disponível em: https://www.mscand.dk/article/view/14421. Acesso em: 25 apr. 2024.