HU, T.; LU, L. Multiplicity of positive solutions for Kirchhoff type problems in $\mathbb R^3$. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 1, p. 231–252, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.028. Acesso em: 22 jul. 2024.