ZHAO, X. A new lower bound for the number of roots of maps between graphs. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 1, p. 17–29, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.002. Acesso em: 22 jul. 2024.