ZHANG, Qiang; ZHAO, Xuezhi. Fixed point indices and fixed words at infinity of selfmaps of graphs II. Topological Methods in Nonlinear Analysis, [S. l.], v. 61, n. 1, p. 257–267, 2023. DOI: 10.12775/TMNA.2022.007. Disponível em: https://apcz.umk.pl/TMNA/article/view/42808. Acesso em: 7 feb. 2026.