1. Water and Wastewater Monitoring Analysis Methods;Agency, T.N.E.P,1989
2. Chronostratigraphic techniques in recent sediments;Appleby,2001
3. Zooplankton of the Great Lakes: A Guide to the Identification and Ecology of the Common Crustacean Species;Balcer,1984
4. Quantitative palaeoenvironmental reconstructions 161–254;Birks,1995
5. Cladoceran remains as evidence of change in trophic state in three Swiss lakes;Boucherle;Hydrobiol,1983