TY CONF TI Econometric analysis of the impact of the price of the Russian grade of high-sulfur oil «URALS» on the exchange rate (dollar to rubles) KW Oil KW exchange rate KW ruble KW dollar KW regression equation KW dummy variables JO Mathematics in Economics AU Sinditskaya, E.A. AU Ershova, T.A. PY 2024 PB AUS PUBLISHERS