00660naa#a2200181#i#450# EN\INFRA-M\bibl\39503 20240724235807.3 2306-1731 20200921b2020####ek#y0engy0150####ca RU Methodological Features of Preparation for Solving Economic Problems of the Unified State Exam in Mathematics Journal article Moscow INFRA-M Academic Publishing LLC. 2020 7 с. Journal article local Статистика. Демография. Социология. 31 Vlasov Dmitriy Anatol'evich Sinchukov Aleksandr Valer'evich naukaru.ru