GONÇALVES, J. V.; MARCIAL, M. R.; MIYAGAKI, O. H. Topological structure of the solution set of singular equations with sign changing terms under Dirichlet boundary condition. Topological Methods in Nonlinear Analysis, [S. l.], v. 47, n. 1, p. 73–89, 2015. DOI: 10.12775/TMNA.2015.091. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2015.091. Acesso em: 23 apr. 2024.