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4. E. V. Blagodatskaya and N. D. Anan’eva, “Assessment of the resistance of soil microbial communities to pollutants,” Eurasian Soil Sci. 29, 1251–1255 (1996).
5. A. A. Bobrov, “Phytoliths of the steppe plants of Iki- Burul’skii district of Kalmykia: first results,” in Ostrovnoi Burial Ground: The Results of Complex Analysis of Archeological Monuments in the Northwestern Caspian Region (Moscow, 2002), pp. 167–186.