00506naa#a2200169#i#450# EN\INFRA-M\bibl\12452 20250111132145.6 2500-0527 20160525b2016####ek#y0engy0150####ca RUS RU Mathematical analysis of the economy: N-dimensional space. Functions. Extremes Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local CHyeryemnykh YUriy zh-szf.ru