1. Apte, S.C. and Batley, G.E. 1995. Trace metal speciation of labile chemical species: other methods. In: A. Tessier and D.R Turner (eds), Metal Speciation and Bioavailability in Aquatic Systems, Chap. 7. John Wiley & Sons, Chichester.
2. Buffle, J. 1988. Complexation reactions in natural systems: an analytical approach. Ellis Horwood, Chichester.
3. Campbell, P. G. C. 1995. Interactions between trace metals and aquatic organisms: A critique of the free-ion activity model. In: A. Tessier and D.R Turner (eds), Metal Speciation and Bioavailability in Aquatic Systems, Chap. 2. John Wiley & Sons, Chichester.