SQUASSINA, M.; VAN SCHAFTINGEN, J. Finding critical points whose polarization is also a critical point. Topological Methods in Nonlinear Analysis, [S. l.], v. 40, n. 2, p. 371–379, 2012. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2012.037. Acesso em: 25 apr. 2024.