BARTUZEL, G.; FRYSZKOWSKI, A. Stability of principal eigenvalue of the Schrödinger type problem for differential inclusions. Topological Methods in Nonlinear Analysis, [S. l.], v. 16, n. 1, p. 181–194, 2000. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2000.037. Acesso em: 22 jul. 2024.