LIU, J.; LIU, X.-Q.; WANG, Z.-Q. Existence theory for quasilinear elliptic equations via a regularization approach. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 2, p. 469–487, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.008. Acesso em: 23 jan. 2022.