PEČIULYTĖ, Sigita; ŠTIKONAS, Artūras. On the generalized eigenfunctions system of the Sturm–Liouville problem. Lietuvos matematikos rinkinys, [S. l.], v. 48, n. proc. LMS, p. 327–332, 2008. DOI: 10.15388/LMR.2008.14655. Disponível em: https://journals.vu.lt./LMR/article/view/14655. Acesso em: 27 apr. 2025.