PEČIULYTĖ, Sigita; ŠTIKONIENĖ, Olga; ŠTIKONAS, Artūras. On the spectrum of a stationary problem with nonlocal integral type boundary condition. Lietuvos matematikos rinkinys, [S. l.], v. 44, n. spec., p. 655–659, 2004. DOI: 10.15388/LMR.2004.15312. Disponível em: https://www.zurnalai.vu.lt/LMR/article/view/15312. Acesso em: 4 jan. 2026.