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3. V. A. Baranovskaya and V. I. Azovtsev, “Influence of irrigation on the migration of carbonates in soils of the Volga region,” Pochvovedenie, No. 10, 17–26 (1981).
4. L. A. Vorob’eva, Chemical Analysis of Soils (Moscow State Univ., Moscow, 1998) [in Russian].
5. N. I. Gorbunov, L. P. Yudina, and N. V. Vainshtein, “Dissolution rates of gypsum and calcite,” Pochvovedenie, No. 10, 65–68 (1979).