1. 2 J Byles . The positive side of the ageing process . Australian Doctor1999 ; 19 March : 28 .
2. 3 D Gibson, S Mathur, and L Racic ) Older Australians at a Glance. Canberra: Australian Institute of Health and Welfare and Office for the Aged, Department of Health and Family Services, Commonwealth of Australia, 1997 .