HUANG, Y. Positive solutions of quasilinear elliptic equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 12, n. 1, p. 91–107, 1998. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.030. Acesso em: 17 jan. 2022.