PELYUKH, G. P. Investigation of the structure of the set of continuous solutions of systems of nonlinear difference equations with continuous argument. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 1, p. 99–108, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3293. Acesso em: 6 dec. 2025.