1. Heavy metals in soils;Alloway,1995
2. Anderson A . Mercury in soils. In: Nriagu JO. The Biogeochemistry of Mercury in the Environment. Elsevier, North-Holland: Biomedical Press, 1979, pp. 79-112.
3. Mercury analysis in geochemical exploration;Azzaria;Can Min Metall (CIM) Bull,1969
4. Mercury speciation in sediments affected by dumped mining residues in the drainage area of the Idrija mercury mine, Slovenia;Biester;Environ Sci Technol,2000
5. Busher, DP, (1992). Mercury in river sediments from Garimpeiro activities in the vicinity of Ouro Preto, Minas Gerais, Brazil. M.Sc. Thesis, Faculty and Board of Trustees of the Colorado School of Mines, Golden, Colorado, 140 pp.