GOELEVEN, D.; NGUYEN, V. H.; THÉRA, M. Nonlinear eigenvalue problems governed by a variational inequality of von Karman’s type: a degree-theoretic approach. Topological Methods in Nonlinear Analysis, [S. l.], v. 2, n. 2, p. 253–276, 1993. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1993.042. Acesso em: 20 apr. 2024.