PELYUKH, G. P. On Global Solutions of Systems of Nonlinear Functional Differential Equations with Deviating Argument Dependent on Unknown Functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 3, p. 402–407, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4076. Acesso em: 6 dec. 2025.