00480naa#a2200157#i#450# EN\\bibl\90353 20241123052547.6 2221-3260 20240930b2024####ek#y0engy0150####ca RU Approaches to determining the essence of export diversification Journal article Yaroslavl Yaroslavl State Technical University 2024 7 с. Journal article local Livenec Mihaela Ivanovna chemintech.ru