1. Anderson, M. J., 2001. A new method for non parametric multivariate analysis of variance. Austral Ecology 26: 32–46.
2. Anderson, M. J., R. N. Gorley & K. R. Clarke, 2008. PERMANOVA+ for PRIMER. Guide to software and statistical methods PRIMER-E Ltd, Plymouth, UK.
3. APHA, AWWA & WEF, 2005. Standard Methods for the Examination of Water and Wastewater, 21st edn. American Public Health Association, Washington, DC.
4. Bregnballe, T., C. Speich, A. Horsten & A. D. Fox, 2009. An experimental study of numerical and behavioural responses of spring staging dabbling ducks to human pedestrian disturbance. Wildfowl (special issue 2): 131–142.
5. Campbell, D. A., C. A. Cole & R. P. Brooks, 2002. A comparison of created and natural wetlands in Pennsylvania, USA. Wetlands Ecology and Management 10: 41–49.