1. L. A. Anishchenko, O. V. Valyaeva, O. S. Prots’ko, and O. F. Razmanova, “Heavy oils of the Timan–Pechora province,” Vestn. Inst. Geol. Komi Nauchn Ts, Ural. Otd. RAS 9, 11–14 (2014).
2. T. K. Bazhenova, V. F. Vasil’eva, L. I. Klimova, A. I. Shapirov, V. K. Shimansky, and L. A. Yakovleva (Gembitskaya), Organic Geochemistry of the Timan–Pechora Basin (VNIGRI. St. Petersburg, 2008) [in Russian].
3. N. S. Burdel’naya, D. A. Bushnev, E. A. Golubev, A. A. Derevesnikova, and V. A. Radaev, “Thermolysis of asphaltenes of Timan–Pechora heavy oils,” Pet. Chem. 60 (6), 699–708 (2020).
4. D. A. Bushnev, Principles of Geochemical Interpretation of Data on Composition and Distribution of Individual Organic Compounds in Oils and Sedimentary Rocks (Geoprint, Syktyvkar, 1999) [in Russian].
5. D. A. Bushnev, “The composition of biomarkers in bitumen and pyrolysis products of kerogen from the Pechora–Basin Upper Devonian deposits,” Petrol. Chem. 42 (5), 291–305 (2002).