00486naa#a2200181#i#450# EN\\bibl\12377 20240704064713.4 2071-2367 20160626b2016####ek#y0engy0150####ca RUS RU Dynamics of the social structure of the Russian middle class Journal article Moscow RANEPA 2016 10 с. Journal article local Alekseenok Anna Galtsova Anna zh-szf.ru