PEČIULYTE, S.; ŠTIKONIENE, O.; ŠTIKONAS, A. Sturm‐Liouville problem for stationary differential operator with nonlocal integral boundary condition. Mathematical Modelling and Analysis, [S. l.], v. 10, n. 4, p. 377–392, 2005. DOI: 10.3846/13926292.2005.9637295. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/9693. Acesso em: 26 jun. 2025.