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3. A. S. Vladychenskii, E. G. Bogomolova, and O. N. Abysova, “Soil cover features in high-mountain belts of subboreal and boreal zones,” Eurasian Soil Sci. 37 (12), 1352–1357 (2004).
4. A. S. Vladychenskii, N. O. Kovaleva, and Yu. M. Kosareva, “Organic matter of Holocene soils in the Khibiny Ridge,” Dokl. Ekol. Pochvoved. 2 (2), 213–228 (2006).
5. S. V. Goryachkin, Soil Cover of the North (GEOS, Moscow, 2010) [in Russian].