CAPIETTO, A.; DAMBROSIO, W. Multiplicity results for superquadratic Dirichlet boundary value problems in $\mathbb R^2$. Topological Methods in Nonlinear Analysis, [S. l.], v. 31, n. 1, p. 19–28, 2008. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.002. Acesso em: 18 apr. 2024.