“On the Existence of Continuous on $t\in\mathbb{R}^{-}$ Solutions of Systems of Linear Functional-Difference Equations”. Neliniini Kolyvannya 28, no. 4 (December 30, 2025). Accessed May 25, 2026. https://nosc.imath.kiev.ua/index.php/nosc/article/view/1202.