MARANO, S. A.; MOTREANU, D.; PUGLISI, D. Multiple solutions to a Dirichlet eigenvalue problem with $p$-Laplacian. Topological Methods in Nonlinear Analysis, [S. l.], v. 42, n. 2, p. 277–291, 2013. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2013.037. Acesso em: 25 mar. 2023.