CASTRO, A.; FINAN, M. B. Existence of many sign-changing nonradial solutions for semilinear elliptic problems on thin annuli. Topological Methods in Nonlinear Analysis, [S. l.], v. 13, n. 2, p. 273–279, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.014. Acesso em: 24 apr. 2024.