MelіkіdzeTV. On application of the averaging method to the solution of one non-linear integro-differential equation with small parameter of hyperbolic type. Ukr. Mat. Zhurn. [Internet]. 1971Feb.23 [cited 2024Nov.24];23(2):257-61. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8511