1. Australian Bureau of Statistics. Population by age and sex, Australian states and territories, Jun 2005. Canberra: Australian Bureau of Statistics; Catalogue No. 3201. 2005.
2. Australian Bureau of Statistics. Population by age and sex, Australian states and territories, Jun 2006. Canberra: Australian Bureau of Statistics; Catalogue No. 3201.0. 2006
3. Kalache A. Ageing worldwide. In: Ebrahim S, Kalache A, editors. Epidemiology in old age. London: British Medical Journal, 1996;22–31.
4. Emergency department use by nonagenarian patients;Mitsunaga;Geriatrics & Gerontology International,2006
5. Functional decline in nonagenarians after a visit to an ED [Letters to the Editor];Formiga;American Journal of Emergency Medicine,2003