1. Mercury Study Report to Congress, US EPA, EPA-452R/R-97-004 (1997).
2. D. Porcella, Mercury in the environment, biogeochemistry, in: C. Watras, J. Huckabee (Eds.), Mercury Pollution, Integration and Synthesis, Lewis Publishers, 1994.
3. H. Clever (Ed.), Mercury in Liquids, Compressed Gases, Molten Salts and Other Elements, IUPAC Solubility Data Series, Vol. 29, Pergamon, 1987.
4. On the determination of total mercury in natural gases using the amalgamation technique and cold vapor atomic absorption spectrometry;Frech;J. Anal. At. Spectrom.,1995
5. US EPA Method, 7473 (1996).