OLEINICHENKO, A. P. Asymptotic Behavior of Solutions of Systems of Functional Differential Equations with Nonlinear Deviation of Argument. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 1, p. 71–77, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4041. Acesso em: 6 dec. 2025.