PEČIULYTĖ, Sigita; ŠTIKONAS, Artūras. Sturm–Liouville problem with two point nonlocal second type boundary condition. Lietuvos matematikos rinkinys, [S. l.], v. 45, n. spec., p. 432–436, 2005. DOI: 10.15388/LMR.2005.14653. Disponível em: https://www.journals.vu.lt/LMR/article/view/14653. Acesso em: 16 apr. 2025.