1. Department of Health and Ageing Past copayments and safety net thresholds 2008 http://www.aodgp.gov.au/internet/main/publishing.nsf/Content/health-pbs-general-pbs-copayment.htm
2. Australian Government Department of Health and Ageing Schedule of Pharmaceutical Benefits, 31 July 2008 http://www.pbs.gov.au/html/healthpro/publication/view?date=20080701&type=FlashPaper&name=general-schedule
3. Medicare Australia Bulletin board: PBS Safety Net edition 2005 http://www.medicareaustralia.gov.au/provider/pubs/news/bulletin/files/ma_pbs_bulletin_board_safety_net_edition.pdf