SERRIN, J.; ZOU, H. Classification of positive solutions of quasilinear elliptic equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 3, n. 1, p. 1–26, 1994. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1994.001. Acesso em: 24 oct. 2021.