TORNÉ, O. A remark on minimal nodal solutions of an elliptic problem in a ball. Topological Methods in Nonlinear Analysis, [S. l.], v. 24, n. 2, p. 199–207, 2004. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2004.025. Acesso em: 20 apr. 2024.