TY JOUR TI Carbon isotopy of individual aromatic compounds of petroleum for their geochemistry understanding KW aromatization isotope effect KW carbon isotopes of aromatic hydrocarbons KW isotopic bond numbers JO Vestnik of geosciences AU Bushnev, D.A. PY 2022 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"