1. S. N. Luoma, Sci. Total Environ. 28, 1 (1983).
2. U. Forstner and G. T. W. William, Metal Pollution in the Aquatic Environment (Springer, Berlin, 1983).
3. R. E. Kirk and D. F. Othmer, Encyclopedia of Chemical Technology, 3rd ed. (Wiley, New York, 1979), Vol. 14.
4. L. Parmeggiani, Encyclopedia of Occupational Health and Safety, 3rd ed. (International Labor Organization, Geneva, 1983), Vol. 1.
5. Y. S. Choi and H. S. Choi, Bull. Korean Chem. Soc. 24, 222 (2003).