MARINO, A.; MUGNAI, D. Asymptotically critical points and their multiplicity. Topological Methods in Nonlinear Analysis, [S. l.], v. 19, n. 1, p. 29–38, 2002. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.002. Acesso em: 4 may. 2024.