[1]
A. M. Samoilenko, V. G. Samoilenko, and V. S. Sobchuk, “On periodic solutions of the equation of a nonlinear oscillator with pulse influence”, Ukr. Mat. Zhurn., vol. 51, no. 6, pp. 827–834, Jun. 1999, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4669