Gambassi G., Landi F., Peng L., Brostrup-Jensen C., Calore K., Hirdes J., Lipsitz L., Mor V., Bernabei R..  1998.  Validity of diagnostic and drug data in standardized nursing home resident assessments: potential for geriatric pharmacoepidemiology. SAGE Study Group. Systematic Assessment of Geriatric drug use via Epidemiology. Medical Care. 36(2):167-79.

Onder G., Carpenter I., Finne-Soveri H., Gindin J., Frijters D., Henrard J.C, Nikolaus T., Topinkova E., Tosato M., Liperoti R. et al..  2012.  Assessment of nursing home residents in Europe: the Services and Health for Elderly in Long TERm care (SHELTER) study. BMC Health Serv Res. 12:5.