1.
Slyusarchuk VY. Necessary and sufficient conditions for the absolute instability of solutions of linear differential-difference equations with self-adjoint operator coefficients. Ukr. Mat. Zhurn. [Internet]. 2018May25 [cited 2024Apr.20];70(5):715-24. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1590