1. Andreyashkina, N.I., Modern state of the plain and mountain plant communities: composition and structure (Yamal Peninsula, Polar Ural), Vestn. Tomsk. Gos. Univ., Biol., 2013, no. 1 (21), pp. 30–43.
2. Arestova, I.Yu., Evaluation of tundra ecosystems using geochemical and phytoindication indices, Cand. Sci. (Geogr.) Dissertation, St. Petersburg, 2003.
3. Banat, K.M., Howari, F.M., and Al-Shatnawi, S.Y., Stability and environmental profile of toxic heavy metals in soil around a crude oil refinery, Int. J. Environ. Pollut., 2006, vol. 28, pp. 162–184.
4. Barnes, D.L. and Chuvilin, E., Migration of petroleum in permafrost affected regions, Soil Biol., 2009, vol. 16, pp. 263–278.
5. Bioremediation of Petroleum-Hydrocarbons in Cold Regions, Filler, D.M., Snape, I., and Barnes, D.L., Eds., Cambridge: Cambridge Univ. Press, 2008.