PEČIULYTĖ, Sigita; ŠTIKONAS, Artūras. On positive eigenfunctions of one nonlocal boundary problem. Lietuvos matematikos rinkinys, [S. l.], v. 46, n. spec., p. 313–317, 2023. DOI: 10.15388/LMR.2006.15000. Disponível em: https://www.journals.vu.lt/LMR/article/view/15000.. Acesso em: 16 may. 2024.