1. Ganzhara, N.F., Pochvovedenie (Soil Science), Moscow: Agrokonsalt, 2001.
2. Pochvovedenie. Uchebnik dlya universitetov. Ch. 1. Pochva i pochvoobrazovanie (Soil Science: A University Textbook, part 1: Soil and Its Formation), Kovda, 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, Their Origin and Importance for Root Nutrition of Higher Plants), Moscow: Akad. Nauk SSSR, 1958.
4. Fedotov, G.N. and Dobrovol’skii, G.V., Pochvovedenie, 2012, no. 8, pp. 908–920.
5. Piccolo, A., Soil Sci., 2001, vol. 166, no. 11, pp. 810–832.