ČIEGIS, Raimondas; ŠTIKONIENĖ, Olga; SUBOČ, Olga. On one problem with non-local boundary conditions. Lietuvos matematikos rinkinys, [S. l.], v. 41, n. spec., p. 497–503, 2001. DOI: 10.15388/LMR.2001.34636. Disponível em: https://journals.vu.lt./LMR/article/view/34636. Acesso em: 19 apr. 2025.