00540naa#a2200169#i#450# EN\\bibl\55544 20241212120354.4 2500-3372 20221208b2022####ek#y0engy0150####ca RU Economic Efficiency Assessment of Oil Producers during the Transition to Added Income Tax Journal article Kemerovo Kemerovo State University 2022 6 с. Journal article local Kamdina Lyudmila Vladimirovna Simchenko Ol'ga Leonidovna zh-szf.ru