1. Batley, G. E., Gardner, D.: Water Res. 11, 745 (1977)
2. Bernhard, M., Zattera, E.: Major Pollutants in the Marine Environment, Proc. 2nd Congr.: Marine Pollutants in the Marine Waste Disposal, San Remo 1973, p. 195, E. A. Pearson, E. DeFraje Frangipane (eds.), London: Pergamon Press 1975
3. Boutron, C., Martin, S.: Anal. Chem. (1979), to appear.
4. Eichholz, G. G., Nagel, A. E., Hughes, R. B.: Anal. Chem. 37, 863 (1965)
5. Friberg, L., Piscator, M., Nordberg, G. F., Kjellstrom, T.: Cadmium in the Environment, 2nd ed., p. 137. Cleveland: CRC Press 1974