00630naa#a2200181#i#450# EN\RIOR\bibl\71624 20250109172653.4 2500-1469 20231230b2023####ek#y0engy0150####ca RU Indicator approach in assessing the processes of demographic aging in the Russian Federation Journal article Moscow Publishing Center RIOR 2023 10 с. Journal article local Демография. Социология. Статистика. 31 Mikhailova Ekaterina Olegovna Aksyanova Anna Vladimirovna riorpub.com