1. Akimtsev VV, Boldyreva AV, Golubev SN et al (1962) Content of microelements in soils of Rostov oblast. In: Microelements and natural radioactivity. RGU, Rostov-on-Don, pp 37–42 (in Russian)
2. Bezuglova OS, Sobornikova IG (1989) Humus status and distribution of heavy metals in soils of the 30-km zone of the Rostov NPP. In: Problems of land use at the current perestroika stage, issue 3, Kiev, pp 180–183 (in Russian)
3. Bezuglova OS, Kazeev KSh, Kolesnikov SI, Nazarekno OG (2013) Current state of chernozems. In: Proceedings of the International Scientific Conference on the current state of chernozems, Postov-on-Don, 24–26 Sept 2013, pp 6–10 (in Russian)
4. Dobrovolskii VV (1998) Basic principles of biogeochemistry. Vysshaua shkola, Moscow (in Russian)
5. dos Anjos MJ, Lopes RT, de Jesus EFO, Assis JT, Cesareo R, Barradas CAA (2000) Quantitative analysis of metals in soil using X-ray fluorescence. Spectrochim Acta B 55:1189–1194