AIZICOVICI, Sergiu; PAPAGEORGIOU, Nikolaos S.; STAICU, Vasile. Nonlinear, nonhomogeneous parametric Neumann problems. Topological Methods in Nonlinear Analysis, [S. l.], v. 48, n. 1, p. 45–69, 2016. DOI: 10.12775/TMNA.2016.035. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.035. Acesso em: 4 jul. 2025.