Pelyukh, G.P. (2001) “On the Existence of Local Smooth Solutions of Systems of Nonlinear Functional Equations with Deviations Dependent on Unknown Functions”, Ukrains’kyi Matematychnyi Zhurnal, 53(1), pp. 64–77. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4222 (Accessed: 5 December 2025).