1. Campbell, P.G.C.: Interactions between trace metals and aquatic organisms: a critique of the free-ion activity model. In: Tessier, A., Turner, D.R. (eds.) Metal Speciation and Bioavailability in Aquatic Systems. Wiley, New York (1995)
2. Sunda, W., Guillard, R.R.L.: The relationship between cupric ion activity and the toxicity of copper to phytoplankton. J. Mar. Res. 134, 511–529 (1976)
3. NATO Conference Series IV, Marine Sciences;F.M.M. Morel,1983
4. Brand, L.E., Sunda, W.G., Guillard, R.R.L.: Reduction of marine phytoplankton reproduction rates by copper and cadmium. J. Exp. Mar. Biol. Ecol. 96, 225–250 (1986)
5. Verweij, W.: Speciation and bioavailability of copper in lake Tjeukemeer. Ph.D. thesis, University of Wageningen, The Netherlands (1991), 143 pp