HROD, I. M. Conditions for the existence of bounded solutions of one class of nonlinear differential equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 3, p. 317–325, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3456. Acesso em: 27 apr. 2025.