SERGEJEVA, Natalija. On Fučik spectra for third order equations. Mathematical Modelling and Analysis, [S. l.], v. 12, n. 2, p. 227–234, 2007. DOI: 10.3846/1392-6292.2007.12.227-234. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/7124. Acesso em: 9 may. 2025.