1. Agafonov, E.V., Heavy metals in chernozems of Rostov oblast, in Tyazhelye metally i radionukleidy v agroeko-sistemakh (Heavy Metals and Radionuclides in Agricul-tural Ecosystems), Novocherkassk, 1994, pp. 22–26.
2. Agrokhimicheskie metody issledovaniya pochv (Agrochemi-cal Analysis of Soils), Moscow: Nauka, 1975.
3. Alekseenko, V.A., Heavy metals in environment, in Pochvy geokhimicheskikh landshaftov Rostovskoi oblasti (Soils of Geochemical Landscapes of Rostov Oblast), Mos-cow: Logos, 2002.
4. Cherkashina, I.F., Dolzhenko, G.P., and Fedorov, Yu.A., Role of geomorphologic differentiation of a landscape in distribution of heavy metals in soils (by example of distribution of Mn in the Lower Don River floodplain), in Bezopastnost’ zhiznedeyatel’nosti. Okhrana truda i okruzhayushchei sredy (Safety of Life Activities. Pro-tection of Labor and Environment), Rostov-on-Don: Rostov. Gos. Akad. S-kh. Melioratsii, 2001, no. 2, pp. 74–76.
5. Ekologiya Novocherkasska. Problemy, puti reshsniya (Ecol-ogy of Novocherkassk: Problems and Their Solution), Belousova, N.V., Ed., Rostov-on-Don: Sev.-Kav. Nauch. Tsentr, Vysshei Shkoly, 2001.