00473naa#a2200169#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200009400102210003700196215001000233608002700243700001800270856001500288EN\\bibl\8599120241125051937.1##a2658-3569##a20190325b2019####ek#y0engy0150####ca0#aRUS##aRU1#aOutsourcing concept in oil and gas industries: cases of world and RussiaeJournal article1#aMoscowcElectronic scienced2019##a0 с.##aJournal article2local#1aMezinovagI A4#aecience.ru