DIRAC, G. A. On Complete Graphs and Complete Stars Contained as Subgraphs in Graphs. MATHEMATICA SCANDINAVICA, [S. l.], v. 12, p. 39–46, 1963. DOI: 10.7146/math.scand.a-10671. Disponível em: https://www.mscand.dk/article/view/10671. Acesso em: 24 nov. 2024.