1. Getting 2 Zero 2010 http://www.g2z.org.au/assets/pdf2013/DianaChua_VETS5017_G2Z.07.jr.pdf
2. Division of Local Government, NSW Department of Premier and Cabinet Analysis of council data collection for seizures of cats and dogs 2011/2012. 2013 http://www.dlg.nsw.gov.au/sites/default/files/pound_data_report_-_2011_12.pdf .
3. RSPCA RSPCA Australia national statistics https://www.rspca.org.au/sites/default/files/website/The-facts/Statistics/RSPCA_Australia-Report_on_animal_outcomes-2014-2015.pdf
4. Dimensions of the pet population problem;Faulkner;J Am Vet Med Assoc,1975
5. A new look at pet overpopulation;Arkow;Arthrozoos,1994