JAKUBĖLIENĖ, Kristina. An eigenvalue problem for the differential operator with an integral condition. Lietuvos matematikos rinkinys, [S. l.], v. 53, n. A, p. 48–53, 2012. DOI: 10.15388/LMR.A.2012.09. Disponível em: https://test.zurnalai.vu.lt/LMR/article/view/14869. Acesso em: 27 oct. 2025.