CHEN, X.; ZHAO, X. Knot invariants coming from pre-image indices. Topological Methods in Nonlinear Analysis, [S. l.], v. 56, n. 2, p. 519–528, 2020. DOI: 10.12775/TMNA.2019.121. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.121. Acesso em: 22 lip. 2024.