GORODNII, M. F. Stability of Bounded Solutions of Differential Equations with Small Parameter in a Banach Space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 7, p. 889–900, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3964. Acesso em: 6 dec. 2025.