COFFMAN, Adam; LEBL, Jiří. Removing isolated zeroes by homotopy. Topological Methods in Nonlinear Analysis, [S. l.], v. 54, n. 1, p. 275–296, 2019. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2019.042. Acesso em: 8 jul. 2025.