On the structure of the set of solutions of a certain class of systems of nonlinear differential-functional equations of neutral type. Neliniini Kolyvannya, [S. l.], v. 5, n. 1, p. 58–65, 2002. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/200. Acesso em: 22 jan. 2026.