1. Nursing Care in the United States: Failure in Public Policy;Subcommittee on Long-Term Care, Special Committee on Aging, US Senate,1974
2. Studies of illness in the aged;Katz;J Am Med Assoc,1963
3. Assessment of older people: self maintaining and instrumental activities of daily living;Lawton;Gerontologist,1969
4. Simulated activities of daily living examination;Potvin;Arch Phys Med Rehabil,1972
5. Seriousness of illness rating scale;Wyler;J Psychosom Res,1968