MARTI, J.-A.; NUIRO, S. P. Analyse algébrique d’un probléme de Dirichlet non linéaire et singulier. Topological Methods in Nonlinear Analysis, [S. l.], v. 13, n. 2, p. 301–311, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.016. Acesso em: 29 mar. 2024.