@article{Ronto_2003, title={Exact Solvability Conditions for the Cauchy Problem for Systems of First-Order Linear Functional-Differential Equations Determined by $(σ_1, σ_2, ... , σ_n; τ)$-Positive Operators}, volume={55}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/4023}, abstractNote={We obtain new sufficient conditions under which the Cauchy problem for a system of linear functional-differential equations is uniquely solvable for arbitrary forcing terms. The conditions established are unimprovable in a certain sense.}, number={11}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Ronto, A. M.}, year={2003}, month={Nov.}, pages={1541-1568} }