00543naa#a2200169#i#450# EN\INFRA-M\bibl\12874 20250218175027.2 2500-0527 20160625b2016####ek#y0engy0150####ca RUS RU The concentration of production and the economic concentration as systemic foundations of economic development Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Burganov Rais Abrarovich zh-szf.ru