00735naa#a2200193#i#450# EN\\bibl\113415 20260320181831.5 2782-4586 20260204b2026####ek#y0engy0150####ca RU Assessment of the efficiency of oil and gas sector enterprises using the example of PJSC Tatneft named after V.D. Shashin Journal article Moscow ITBO University 2026 8 с. Journal article local Экономика промышленности и ремесленного производства. 338.45 Pyhtina Valeriya Aleksandrovna Nevedomskaya Aleksandra Olegovna Yahontova Polina Igorevna jomeam.ru