Owen, S.J. 1996. Ecological weeds on conservation land in New Zealand: a database. 118p. Department of Conservation, Wellington as cited at http://www.hear.org/weedlists/other_areas/nz/nzecoweeds.htm, created 20 July 1999, updated 16 April 2005, and accessed 18 September 2017.
Online details: http://www.hear.org/weedlists/other_areas/nz/nzecoweeds.htm