Samoilenko AM. On the Asymptotic Integration of a System of Linear Differential Equations with a Small Parameter in the Coefficients of a Part of Derivatives. Ukr. Mat. Zhurn. [Internet]. 2002Nov.25 [cited 2024Nov.22];54(11):1505-17. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4188