КЛЮС, І. Two-point problem for systems of differential equations with partial. Proceedings of National Aviation University (archive), [S. l.], v. 40, n. 3, p. 270–273, 2009. DOI: 10.18372/2306-1472.40.1782. Disponível em: http://jrnl.kai.edu.ua/index.php/visnik/article/view/1782. Acesso em: 24 apr. 2026.