1. The practice of geriatrics;Agate,1970
2. Epidemiology;Mann,1996
3. The health of the UK's elderly people: MRC topic review,1994
4. Health trends in the last 75 years;Markowe;Health Trends,1994
5. Survival after the age of 80 in the United States, Sweden, France, England and Japan;Manton;N Engl J Med,1995