SERGEJEVA, Natalija. On nonlinear spectra for some nonlocal boundary value problems. Mathematical Modelling and Analysis, [S. l.], v. 13, n. 1, p. 87–97, 2008. DOI: 10.3846/1392-6292.2008.13.87-97. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/6993. Acesso em: 9 may. 2025.