Bel’skiiD. V., and PelyukhG. P. 2019. “Asyptotic Bounds for the Solutions of Functional and differentialfunctional equations With Constant and Linear Delays”. Ukrains’kyi Matematychnyi Zhurnal 71 (9), 1249-70. https://umj.imath.kiev.ua/index.php/umj/article/view/1513.