00491naa#a2200181#i#450# EN\RIOR\bibl\10733 20260414191350.2 2409-6024 20160403b2016####ek#y0engy0150####ca RUS RU THE GENESIS OF CLUSTER THEORY Journal article Moscow Publishing Center RIOR 2016 6 с. Journal article local Guskova Nadezhda Dmitrievna Skvortsov Evgeniy buildprod.ru