TY JOUR TI Physico-chemical properties of hard-to-recover oil in the Arctic KW hard-to-recover Arctic oil KW physical and chemical oil characteristics KW oil-bearing basin KW deposits KW reserves KW database JO Vestnik of geosciences AU Yaschenko, I.G. PY 2022 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"