BÁRCENAS, Noé; MORALES-MELÉNDEZ, Quitzeh. Analytical signatures and proper actions. Topological Methods in Nonlinear Analysis, [S. l.], v. 57, n. 1, p. 1–23, 2021. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2020.031. Acesso em: 8 jul. 2025.