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* QLD DNR (2000). Guidelines for using free water surface constructed wetlands to treat municipal sewage. Queensland Government, Department of Natural Resources, Brisbane, Australia. Available: http://www.epa.qld.gov.au
* General information about Planted soil filter [http://www.bodenfilter.de/engdef.htm www.bodenfilter.de/engdef.htm ]
* General information [http://www.constructedwetlands.org www.constructedwetlands.org ]