Vytvytska, uliana 2021. DETERMINATION OF DISCOUNT RATES IN EVALUATION OF EFFICIENCY OF INVESTMENT PROJECTS IN OIL AND GAS PRODUCTION. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry). 2(24) (Dec. 2021), 37–47. DOI:https://doi.org/10.31471/2409-0948-2021-2(24)-37-47.