EVTUKHOV, V. M.; CHERNIKOVA, A. G. On the asymptotic of solutions of second-order differential equations with rapidly varying nonlinearities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 1, p. 73–91, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1420. Acesso em: 5 dec. 2025.