Shaldanbayev A. Sh., Akylbaev M. I., Orazov I., Beysebayeva A. ABOUT SINGLE OPERATOR METHOD OF SOLUTION OF A SINGULARLY PERTURBED CAUCHY PROBLEM FOR AN ORDINARY DIFFERENTIAL EQUATION ࢔ – ORDER . PMS [Интернет]. 10 апрель 2019 г. [цитируется по 23 декабрь 2024 г.];(2):17-36. доступно на: http://89.250.84.46/physics-mathematics/article/view/1169