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2. N. N. Aslanov and S. N. Ryzhov, Composition and Properties of Particle-Size Fractions of Sierozems (Fan, Tashkent, 1969) [in Russian].
3. N. L. Baidina, “On the Contents of Heavy Metals in Particle-Size Fractions of a Soil in Novosibirsk,” Agrokhimiya, No. 3, 69–74 (2001).
4. A. F. Vadyunina and Z. A. Korchagina, Methods for Studying Soil Physical Properties (Agropromizdat, Moscow, 1986) [in Russian].
5. Kh. M. Derkham, Extended Abstract of Candidate’s Dissertation in Biology (Moscow, 2009) [in Russian].