Cummings, J. L., M.D. (1984). Dementia: Definition, classification, and differential diagnosis. Psychiatric Annals, 14(2), 85-87,89.

Finkel, S., Costa, E. S., Cohen, G., Miller, S., & Sartorius, N. (1997). Behavioral and psychological signs and symptoms of dementia: A consensus statement on current knowledge and implications for research and treatment. International Journal of Geriatric Psychiatry, 12(11), 1060-1061. doi: 10.1002/(SICI)1099-1166(199711)12:11