SKUČAITĖ, Agnė; ŠTIKONAS, Artūras. Spectrum Curves for Sturm–Liouville Problem with Integral Boundary Condition. Mathematical Modelling and Analysis, [S. l.], v. 20, n. 6, p. 802–818, 2015. DOI: 10.3846/13926292.2015.1116470. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/1036. Acesso em: 9 may. 2025.