GARCIA-PACHECO, F. J.; HILL, J. R. A partial positive solution to a conjecture of Ricceri. Topological Methods in Nonlinear Analysis, [S. l.], v. 46, n. 1, p. 57–67, 2015. DOI: 10.12775/TMNA.2015.037. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2015.037. Acesso em: 22 jul. 2024.