1.
Kruglov VE. Solution of a second-order Poincaré-Perron-type equation and differential equations that can be reduced to it. Ukr. Mat. Zhurn. [Internet]. 2008Jul.25 [cited 2024Apr.20];60(7):900–917. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3208