DANILOV, V. Ya.; MARTYNYUK, D. I.; STANZHITSKII, A. N. Periodic solutions of systems of differential equations with random right-hand sides. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 2, p. 223–227, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4999. Acesso em: 5 dec. 2025.