1. A. G. Alekseev, I. K. Ivanova, O. N. Chalaya, and V. A. Kashirtsev, “Alkylbenzenes in continental oils of East Siberia,” Nauka Obrazovanie, No. 4, 48–52 (2005).
2. D. A. Bushnev and O. V. Valyaeva, “N-alkylbenzenes and 1-n-alkylnaphthalene in oil series of the Late Devonian Timan–Pechora province,” Vestn. Inst. Geol. Komi Nauchn. Ts. Ur. Otd. Ross. Akad. Nauk, No. 10, 17–20 (2015).
3. D. A. Bushnev S. V. Lavrov, and N. S. Burdelnaya, “Free and sulfur–bound biomarkers of bitumens of combustible shales of the Sysol deposit,” Lithogenesis and Geochemistry of Sedimentary Formations of the Timan–Pechora Region (Syktyvkar, 2000), pp. 86–96 [in Russian].
4. J. Connan, J. Bouroullec, D. Dessort, and P. Albrecht, “The microbial input in carbonate–anhydrite facies of a sabka palaeoenvironment from Guatemala: a molecular approach,” In Advances in Organic Geochemistry 1985, Ed by D. Leythaeuser and J. Rullkötter, Org. Geochem. 10, 29–50(1986).
5. F. X. De Las Heras, J. O. Grimalt, and J. Albaiges, “Novel C-ring cleaved triterpenoid–derived aromatic hydrocarbons in Tertiary brown coals,” Geochim. Cosmochim. Acta 55 (11), 3379–3385 (1991).