CASTRO, A.; VENTURA, I. Existence of solutions to a semilinear elliptic boundary value problem with augmented Morse index bigger than two. Topological Methods in Nonlinear Analysis, [S. l.], v. 49, n. 1, p. 233–244, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.075. Acesso em: 29 mar. 2024.