G. P. Pelyukh, “Asymptotic Behavior of Solutions of Nonlinear Difference Equations with Continuous Argument”, Ukr. Mat. Zhurn., vol. 54, no. 1, pp. 138–141, Jan. 2002, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4048