Petryshyn RI, Samoilenko AM, Sopronyuk ТM. Construction of an Integral Manifold of a Multifrequency Oscillation System with Fixed Times of Pulse Action. Ukr. Mat. Zhurn. [Internet]. 2003 May 25 [cited 2025 Dec. 5];55(5):641-62. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3940