1. Instrumental activities of daily living (IADL) scale. Self-rated version;Philadelphia Geriatric Center;Psychopharmacol Bull,1988
2. Studies of illness in the aged: the index of ADL. A standardized measure of biological function;Katz;JAMA,1963
3. Assisted living at the crossroads: principles for its future;Kane,2001
4. State assisted living policy: 2002;Mollica,2002