IBRAGIMOV, U. Invariant Sets of Control Systems with Distributed Parameters with Time Delay. Eurasian Mathematical Journal, [S. l.], v. 5, n. 4, p. 70–78, 2014. Disponível em: https://emj.enu.kz/index.php/main/article/view/589. Acesso em: 17 sep. 2025.