1. Catatonia, a prospective clinical study;Abrams;Arch Gen Psychiatry,1976
2. Catatonia and mania: patterns of cerebral dysfunction;Abrams;Biol Psychiatry,1979
3. Diagnostic Criteria from DSM-III-R;American Psychiatric Association,1987
4. Diagnostic Statistical Manual IV;American Psychiatric Association,1994
5. On a form of disease resembling some advanced stages of mania and fever;Bell;Am J Insanity,1849