1. Briggs, B. D. J. (2007). The use of waterbodies in SW London by Gadwall and Shoveler; implications for nature conservation. D.Phil. Thesis, Oxford University.
2. Waterbird communities in managed wetlands of varying water depth;Colwell;Waterbirds,2000
3. The Conservation (Natural Habitats, & c.) Regulations 1994.
4. The Council Directive 79/409/EEC of 2 April 1979 on the conservation of wild birds.
5. Northern Shoveler;DuBowy,1996