1.
Evtukhov VM, Droggina AV. Asymptotic representations of solutions of nonautonomous ordinary differential equations. Ukr. Mat. Zhurn. [Internet]. 2019Dec.25 [cited 2024Nov.21];71(12):1626-4. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1006