ZHUMATOV, S. S. On the stability of a program manifold of control systems with variable coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 8, p. 1053–1063, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1497. Acesso em: 5 dec. 2025.