1. American Psychiatric Association Committee on Nomenclature and Statistics (1952). Diagnostic and Statistical Manual of Mental Disorders. Washington.
2. The Association Between Quantitative Measures of Dementia and of Senile Change in the Cerebral Grey Matter of Elderly Subjects
3. Corsellis J. A. N. (1960). Mental Illness and the Ageing Brain. London.
4. ‘The clinical differentiation of senile and arteriosclerotic psychoses.’;Rothschild;Geriatrics,1947
5. American Psychiatric Association Committee on Nomenclature and Statistics (1968). Diagnostic and Statistical Manual of Mental Disorders. Washington.