EVTUKHOV, V. M.; DROGGINA, A. V. Asymptotic representations of solutions of nonautonomous ordinary differential equations: Asymptotic representations of solutions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 12, p. 1626–1646, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1006. Acesso em: 5 dec. 2025.