SAJAVIČIUS, S.; SAPAGOVAS, M. Numerical Analysis of the Eigenvalue Problem for One-Dimensional Differential Operator with Nonlocal Integral Conditions. Nonlinear Analysis: Modelling and Control, [S. l.], v. 14, n. 1, p. 115–122, 2009. DOI: 10.15388/NA.2009.14.1.14535. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/14535. Acesso em: 6 jul. 2025.