1. 2012 Year Book of Australia 2012
2. 2003 http://www.accc.gov.au/
3. Averch , H. Johnson , L. 1962 American Economic Review
4. Balistreri , E. J. Hillberry , R. H. Rutherford , T. J. 2007
5. Sub-national differentiation and the role of the firm in optimal international pricing;Balistreri;Economic Modelling,2009