Shaldanbayev A. Sh., Akylbaev M. I., Orazov I. и Beysebayeva A. (2019) «ABOUT SINGLE OPERATOR METHOD OF SOLUTION OF A SINGULARLY PERTURBED CAUCHY PROBLEM FOR AN ORDINARY DIFFERENTIAL EQUATION ࢔ – ORDER », Известия НАН РК. Серия физико-математическая, (2), сс. 17–36. доступно на: https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1169 (просмотрено: 4 май 2024).