1. L. N. Aleksandrova, “Humus as a System of Polymeric Compounds,” in Proc. Jubilee Session on the Centennial Anniversary of the Birth of V.V. Dokuchaev (Izd. AN SSSR, Moscow, 1949), pp. 225–232 [in Russian].
2. G. Wiegner, Selected Works (Russian Translation), (Sel’khozgiz, Moscow, 1941) [in Russian].
3. N. F. Ganzhara, Soil Science (Agrokonsalt, Moscow, 2001) [in Russian].
4. K. K. Gedroits, Selected Works (Izd. Sel’skokhoz. lit., Moscow, 1955), Vol. 1 [in Russian].
5. M. I. Gerasimova, S. V. Gubin, and S. A. Shoba, Micromorphology of Soils of the Natural Zones of the Soviet Union (Pushchino, 1992) [in Russian].