EVTUKHOV, V. M.; STEKHUN, A. A. Asymptotic representations of solutions of one class of nonlinear nonautonomous differential equations of the third order. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 10, p. 1363–1375, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3395. Acesso em: 5 dec. 2025.