Psychometrics
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Karon, S. L., Sainfort, F., Zimmerman, D. R. 1999. Stability of nursing home quality indicators over time. Medical Care. 37 (6) 570-9.
Alexopoulos, G. S., Abrams, R. C., Young, R. C., Shamoian, C. A. 1988. Cornell Scale for Depression in Dementia. Biol Psychiatry. 23 (3) 271-84.
Hamilton, M. 1967. Development of a rating scale for primary depressive illness. Br J Soc Clin Psychol. 6 (4) 278-96.