1. Bass SA and Caro FG (1996) Theorectical perspectives on production aging, in Crown WH (Ed.)Handbook on Employment in the Elderly, pp 262–75,Westport, Conn, Greenwood Press.
2. Milton Keynes Primary Trust (2000)Critical Appraisal Skills Programme(CASP)©, 2000.
3. NHMRC (2006)How to use the evidence:Assessment and application of scientific evidence, pp 5–10.
4. Spetz J (2005) The aging of the nurse workforce: Recent trends and future challenges, in Miles T and Furino A (Eds)Aging HealthcareWorkforce Issues, Annual Review of Gerontology & Geriatrics 25, Ch 4, Springer Publishing Company, New York.