00527naa#a2200181#i#450# EN\INFRA-M\bibl\11292 20240504083912.6 2587-9111 20160418b2016####ek#y0engy0150####ca RUS RU Population Ageing in Russia: Main Factors, Characteristics and Consequences Journal article Moscow INFRA-M Academic Publishing LLC. 2016 5 с. Journal article local Dudko K. Shcherbakov A. naukaru.ru