1. Wilson, R.C.H., Harding, L.E. and Hirvonen, H. (1995) Marine ecosystem monitoring network design. Ecosystem Health
1, 222–227.
2. Metcalfe, J.L. (1989) Biological water quality assessement of running waters based on macroinvertebrate communities: history and present status in Europe. Environ. Pollut. 60, 101–139.
3. Hopkin, S.P. (1993) In situ biological monitoring of pollution in terrestrial and aquatic ecosystems, in P. Calow (ed.) Handbook of Ecotoxicology Vol 1, Blackwell Scientific Publications, Oxford, pp. 397–427.
4. Phillips, D.J.H. and Rainbow, P.S. (1993) Biomonitoring of Trace Aquatic Contaminants. Elsevier Science Publishers, Barking.
5. Wilson, J.G. (1994) The role of bioindicators in estuarine management. Estuaries
17, 94–101.