00649naa#a2200181#i#450# EN\INFRA-M\bibl\131407 20260806112442.4 2500-0543 20260803b2026####ek#y0engy0150####ca RU "Russian as a State Language" in the Higher Education System Journal article Moscow INFRA-M Academic Publishing LLC. 2026 14 с. Journal article local Народное образование. Воспитание. Обучение. Организация досуга. 37 Ledeneva Yuliya Yur'evna Gladilina Irina P. naukaru.ru