1. Ganzhara, N.F., Pochvovedenie (Soil Scence), Moscow: Agrokonsalt, 2001.
2. Pochvovedenie. Uchebnik dlya universitetov, Ch. 1: Pochva i pochvoobrazovanie (Soil Science: A University Textbook, Ch. 1: Soil and Soil Formation) Kovdy, V.A., Ed., Moscow: Vysshaya Shkola, 1988.
3. Tyulin, A.F., Organno-mineral’nye kolloidy v pochve, ikh genezis i znachenie dlya kornevogo pitaniya vysshikh rastenii (Organomineral Colloids in Soil: Formation and Role in Root Nutrition of Higher Plants), Moscow: Izd. Akad. Nauk SSSR, 1958.
4. Besedin, P.N., Sostav i svoistva kolloidno-ilistykh fraktsii i vodoprochnykh agregatov serozemov i lugovykh pochv (The Composition and Properties of Colloid-Silty Fractions and Water-Resistant Aggregates of Gray Soil and Meadow Soils), Tashkent: Izd. SAGU, 1954.
5. Lobitskaya, L.V., Characteristics of the Organic and Mineral Components of Colloids in Sod-Podzolic Soil, Chernozem, and Krasnozem, Extended Abstract of Cand. Sci. (Agric.) Dissertation, Leningrad, 1966.