On a study of a certain semi-explicit system of differential equations with a changing matrix bundle. Neliniini Kolyvannya, [S. l.], v. 5, n. 2, p. 224–236, 2002. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/216. Acesso em: 22 jan. 2026.