CHEN, Y.; DING, Y. Multiplicity and concentration for Kirchhoff type equations around topologically critical points in potential. Topological Methods in Nonlinear Analysis, [S. l.], v. 53, n. 1, p. 183–223, 2019. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2018.044. Acesso em: 22 jul. 2024.