On the nonexistence of invariant submanifolds for differential systems with impulses. Neliniini Kolyvannya, [S. l.], v. 3, n. 2, p. 271–277, 2000. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/117. Acesso em: 12 apr. 2026.