ILOLOV, M.; SAMOILENKO, A. M. Invariant tori of differential equations in a Banach space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 1, p. 13–21, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4968. Acesso em: 5 dec. 2025.