PAPAGEORGIOU, Nikolaos S.; SMYRLIS, George. Resonant Robin problems with indefinite and unbounded potential. Topological Methods in Nonlinear Analysis, [S. l.], v. 49, n. 1, p. 51–74, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.062. Acesso em: 8 jul. 2025.