1. Suleev DK, Sagitov SI, Sagitov PI, Zhumagulov KK (2004) Ecology and nature management. The concept of a transition to sustainable development. Nauka, Almaty 391 p
2. Chaney RL, Malik M, Li YM et al (1997) Phytoremediation of soil metals. Curr Opin Biotechnol 8:279–284
3. Chaney RL, Li YM, Scott JA (1998) Improving metal hyperaccumulator wild plants to develop commercial phytoextraction systems: approaches and progress. CRC Press, Boca Raton, FL 37 p
4. The concept of ecological safety of the Republic of Kazakhstan (1996) Noosphere 1:135–146
5. Fry SC, Miller JG, Panwill JC (2002) A proposed role for copper ions in cell wall loosening. Plant and Soil 247:57–67