PROSENYUK, L. G. Existence and asymptotic behavior of solutions of an $n$-th-order differential equation partially solved with respect to derivative. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 4, p. 450–453, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5746. Acesso em: 18 dec. 2025.