DE FIGUEIREDO, D. G.; JIANFU, Y. Critical superlinear Ambrosetti-Prodi problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 14, n. 1, p. 59–80, 1999. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1999.022. Acesso em: 28 mar. 2024.