1. Diagnostic and Statistical Manual of Mental Disorders;American Psychiatric Association,1994
2. Diagnostic and Statistical Manual of Mental Disorders;American Psychiatric Association,2013
3. Catatonia: a critical review and therapeutic recommendations;Bartolommei;J. Psychopathol.,2012
4. Catatonia. Rating scale and standardized examination;Bush;Acta Psychiatr. Scand.,1996
5. Catatonia incidence in acute psychiatric admissions;Banerjee;Indian J. Psychiatry,1995