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2. N. I. Bazilevich and A. A. Titlyanova, Biotic Cycle on Five Continents: Nitrogen and Ash Elements in Natural Terrestrial Ecosystems (Izd. Sib. Otd. Ross. Akad. Nauk, Novosibirsk, 2008) [in Russian].
3. N. I. Bazilevich, A. A. Titlyanova, V. V. Smirnov, L. E. Rodin, N. T. Nechaeva, and F. I. Levin, Methods for Studying Biological Cycles in Different Natural Zones (Mysl’, Moscow, 1978) [in Russian].
4. T. A. Vagina and N. G. Shatokhina, “Dynamics of stocks of aboveground and underground organic mass of steppe, meadow and swamp phytocenoses,” in Structure, Functioning and Evolution of the System of Biogeocenoses in Baraba, Vol. 2: Biogeocenotic Processes (Nauka, Sib. Otd., Novosibirsk, 1976), pp. 217‒264 [in Russian].
5. V. I. Volkovintser, Steppe Cryoarid Soils (Nauka, Sib. Otd., Novosibirsk, 1978) [in Russian].