1. Stato di salute e prestazioni sanitarie nella popolazione anziana. Anno 2000;Italian Ministry of Health,2003
2. Home alone and in danger;Campion;N Engl J Med,1996
3. Falls in the elderly: risk factors and prevention;Nevitt,1997
4. A brief clinical instrument to classify frailty in elderly people;Rockwood;Lancet,1999
5. Falls and fractures in older women;Nevitt,1992