BOGDAN, M.; KOLUMBÁN, J. On parametric equilibrium problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 42, n. 2, p. 405–416, 2013. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2013.042. Acesso em: 18 apr. 2024.