1. V. A. Varsanof’eva, “Geomorphology” in Productive Resources of the Komi Autonomous Republic (Akad. Nauk SSSR, Moscow, 1953), pp. 9–22 [in Russian].
2. L. A. Vorob’eva, Theory and Practice of the Chemical Analysis of Soils (Moscow, 1999) [in Russian].
3. G. M. Vtyurin, Soil Cover Patterns in the Taiga Zone of the Northeast of Europe (Leningrad, 1991) [in Russian].
4. M. I. Gerasimova, S. V. Gubin, and S. A. Shoba, Micromorphology of Zonal Natural Soils of the Soviet Union (ONTI PNTs RAN, Pushchino, 1992) [in Russian].
5. L. A. Gugalinskaya, “Soil Formation in the Latest Interglacial and Tendencies of the Modern Soil Development in the Center of the Russian Plain,” in Genesis, Fertility, and Reclamation of Soils (Pushchino, 1980), pp. 32–44 [in Russian].