PELYUKH, G. P. On the asymptotic properties of continuous solutions of the systems of nonlinear functional equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 1, p. 119–125, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2408. Acesso em: 14 apr. 2025.