1. Bergkvist, B.: 1987, Water, Air Soil Pollut. 33, 131.
2. Beza?ínský, M., Pilátová, B., Ji?ele, V. and Bencko, V.: 1984. J. Hyg. Epid. Microbiol. Immunol. 28, 129.
3. Borg, H., Anderson, P. and Johansson, K.: 1989, Sci. Total. Environ. 87/88, 241.
4. Buffle, J.: 1988, Complexation Reactions in Aquatic Systems: An Analytical Approach. E. Horwood, Chichester.
5. Adv. Chem. Ser.;P. G. C. Campbell,1987