Pelyukh, G. P. and Samoilenko, A. M. (1999) “On analytic solutions of nonlinear differential functional equations with nonlinear deviations of arguments”, Ukrains’kyi Matematychnyi Zhurnal, 51(2), pp. 234–240. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4602 (Accessed: 12May2024).