ROMAN, Svetlana; ŠTIKONAS, Artūras. Green functions for stationary problems with nonlocal boundary conditions. Lietuvos matematikos rinkinys, [S. l.], v. 48, n. proc. LMS, p. 333–337, 2008. DOI: 10.15388/LMR.2008.14656. Disponível em: https://journals.vu.lt./LMR/article/view/14656. Acesso em: 4 apr. 2025.