1. Adams N, Carroll D, Madalinski K, Rock S, Wilson T, Pivetz B, Anderson T, Chappell J, Huling S, Palmiotti J, Sayre P (2000) Introduction to phytoremediation, EPA-600/R-99/107. U. S. Environmental Protection Agency, Cincinnati, 72 p.
2. Agnew AF, Corbett DM (1969) Hydrology and chemistry of coal-mine drainage in Indiana. Am Chem Soc Div Fuel Chem Prepr 13(2):137–149
3. Agricola G (1974) Bergbau und Hüttenkunde, 12 Bücher. Ausgewählte Werke, VIII. VEB Deutscher Verlag der Wissenschaften, Berlin, pp 53–723 (First publication 1557)
4. Anonymous (2006) Heavy Metal’ does not necessarily mean ‘Toxic. Nickel 21(4):6
5. Ariza LM (1998) River of vitriol. Sci Am 279(3):26–27