1. Catatonia;Kahlbaum,1973
2. Dementia Praecox and Paraphrenia;Kraepelin,1971
3. Dementia Praecox and the Group of Schizophrenia;Bleuler,1950
4. Catatonia: a separate category in DSM-IV?;Fink;Integr Psychiatry,1991
5. Catatonia: From Psychopathology to Neurobiology;Caroff,2004