4) Smock L. A. (1983) Relationship between metal concentration and organism size in aquqtic insects, Freshwater Biology, 13, 301-311.
5) Kiffney, P. M. and Clements, W. H. (1993) Bioaccumulation of heavymetals by benthic invertebrates at the Arkansas River, Colorado, Environmental Toxicology Chemstry, 12, 1507-1517.