1. B.J. Alloway (Ed.), Heavy Metals in Soils, 2nd Edition, Chapman and Hall, Glasgow, UK, 1995 (Chapters 6, 8, 9, and 11).
2. K.R. Henke, V. Kühnel, D.J. Stephan, R.H. Fraley, C.M. Robinson, D.S. Charlton, H.M. Gust, N.S. Bloom, Critical Review of Mercury Contamination Issues Relevant to Manometers at Natural Gas Industry Sites: GRI-93/0117, Gas Research Institute, Chicago, 1993, pp. 110.
3. Code of Federal Regulations (CFR), 40, 141, 261, 268.40, US Government Printing Office, Superintendent of Documents, Washington, DC, 1994.
4. R.C. Wilmoth, J.L. Kennedy, Industrial Environmental Research Laboratory, Removal of Trace Elements from Acid Mine Drainage, 1979.
5. V.P. Evangelou, Pyrite Oxidation and its Control, CRC Press, Boca Raton, 1995, pp. 95–130.