SADYRBAEV, F.; GRITSANS, A. Nonlinear Spectra for Parameter Dependent Ordinary Differential Equations. Nonlinear Analysis: Modelling and Control, [S. l.], v. 12, n. 2, p. 253–267, 2007. DOI: 10.15388/NA.2007.12.2.14715. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/14715. Acesso em: 11 apr. 2025.