Dario, G. 2005. "Analysis of the Increase in Informality During the House of Representatives 2004 Election". Canberra, Australian Electoral Commission.
Electoral Backgrounder – Informal Voting, Australian Electoral Commission, August 2004. ISSN No 1440-8007.
Medew, R. 2003. "Informal Vote Survey – House of Representatives 2001 Election", Canberra: Australian Electoral Commission
Newman, G. 2005. "Research Report 5, Analysis if Electoral Divisions Classifications", Canberra: Australian Electoral Commission