00473naa#a2200169#i#450# EN\\bibl\85991 20241122062122.5 2658-3569 20190325b2019####ek#y0engy0150####ca RUS RU Outsourcing concept in oil and gas industries: cases of world and Russia Journal article Moscow Electronic science 2019 0 с. Journal article local Mezinova I A ecience.ru