SHEN, Y.; LI, Z.; WANG, Y. Sign-changing critical points for noncoercive functionals. Topological Methods in Nonlinear Analysis, [S. l.], v. 43, n. 2, p. 373–384, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2014.022. Acesso em: 22 jul. 2024.