Headley, T.R., & Tanner, C.C. 2007. Prepared by National Institute of Water and Atmospheric Research for Auckland Regional Council. Auckland Regional Council Technical Report TR2008/030.

https://www.frogenvironmental.co.uk/wp-content/uploads/2014/09/Headley-and-Tanner-2007-Floating-vegetated-islands-for-stormwater-treatment-removal-of-copper-zinc-and-fine-particulates.pdf