Lakusta LM, Petryshyn RI, Samoilenko AM. Error Estimates for the Averaging Method for Pulse Oscillation Systems. Ukr. Mat. Zhurn. [Internet]. 2003 Apr. 25 [cited 2025 Apr. 13];55(4):510-24. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3924