ZHUMATOV, S. S. Stability of a program manifold of control systems with locally quadratic relations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 3, p. 418–424, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3030. Acesso em: 5 dec. 2025.