BÁRCENAS, N.; MORALES-MELÉNDEZ, Q. 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: 22 jul. 2024.