Alekseychuk, Olga. “APPLICATION OF THE SMALL PARAMETER METHOD IN NONLINEAR OSCILLATIONS”. Sworld-Us Conference proceedings 1, no. usc15-01 (December 30, 2022): 22–24. Accessed April 29, 2024. https://www.proconference.org/index.php/usc/article/view/uscusc15-01-008.