1. L. N. Aleksandrova, Soil Organic Matter and Its Transformation (Nauka, Leningrad, 1980) [in Russian].
2. A. L. Aleksandrovskii, Evolution of Soils of the East-European Plain during the Holocene (Nauka, Moscow, 1983) [in Russian].
3. A. L. Aleksandrovskii and O. A. Chichagova, “Radiocarbon Age of Holocene Paleosols in the Forest-Steppe of Eastern Europe,” Pochvovedenie, No. 12, 1414–1422 (1998) [Eur. Soil Sci. 31 (12), 1284–1292 (1998)].
4. Yu. K. Vasil’chuk and V. M. Kotlyakov, Principles of Isotopic Geocryology and Glaciology (Mosk. Gos. Univ., Moscow, 2000) [in Russian].
5. I. P. Gerasimov, “Current Concepts of Soil Age,” in Selected Works: Evolution and Differentiation of the Earth’s Nature (Nauka, Moscow, 1990), pp. 293–304 [in Russian].