1. Alekseev, Yu.V., Tyazhelye metally v pochvakh i rasteniyakh (Heavy Metals in Soils and Plants), Leningrad, 1987.
2. Grishina, L.A. and Samoilova, E.M., Uchet biomassy i khimicheskii analiz rastenii (Calculation of the Biomass and the Chemical Analysis of Plants), Moscow, 1971.
3. Kabata-Pendias, A. and Pendias, H., Trace Elements in Soils and Plants, Boca Raton (USA): CRC, 1985.
4. Kislotnye osadki i lesnye pochvy (Acid Rains and Forest Soils), Nikonov, V.V. and Koptsik, G.N., Eds., Apatity, 1999.
5. Koptsik, G.N., Eruslankina, L.V., Livantsova, S.Yu., and Koptsik, S.V., Effect of Atmospheric Contamination on the Ground Cover of Forest Biogeocenoses in the Northern Taiga under the Impact of Aerial Pollution, Vestn. Mosk. Univ., Ser. 17: Pochvoved., 1999, no. 3, pp. 22–29.