On the solution set structure of a certain class of systems of nonlinear neutral type differential-difference equations. Neliniini Kolyvannya, [S. l.], v. 19, n. 2, p. 247–252, 2016. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/828. Acesso em: 21 jan. 2026.