[1]
K. K. Kenzhebaev, “A constructive method for finding periodic solutions of differential systems”,
Ukr. Mat. Zhurn.
, vol. 47, no. 4, pp. 468–476, Apr. 1995, Accessed: Apr. 09, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/5444