%0 Journal Article %T Composition of hydrocarbons-biomarkers of bitumoids of different-aged deposits of the Timan-Pechora and Volga-Ural oil and gas provinces %A Galiakhmetova, L.K. %A Markelov, R.A. %A Muhamatdinova, R.E. %A Mukhamatdinov, I.I. %A Vahin, A.V. %K bitumoid, chemofossils, biomarkers, hopanes, steranes, hydrocarbons %J Vestnik of geosciences %D 2025 %N 0 %P 7 %I FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"