VITKAUSKAS, Jonas; ŠTIKONAS, Artūras. Relations between spectrum curves of discrete Sturm-Liouville problem with nonlocal boundary conditions and graph theory. Lietuvos matematikos rinkinys, [S. l.], v. 61, n. A, p. 1–6, 2021. DOI: 10.15388/LMR.2020.22474. Disponível em: https://www.journals.vu.lt/LMR/article/view/22474.. Acesso em: 28 apr. 2024.