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://www.journals.vu.lt/LMR/article/view/14869.. Acesso em: 2 may. 2024.