1. Diagnostic and Statistical Manual of Mental Disorders;American Psychiatric Association,1994
2. Negative symptoms in schizophrenia. Definition and validation;Andreasen;Archives of General Psychiatry,1982
3. Negative v positive schizophrenia. Definition and validation;Andreasen;Archives of General Psychiatry,1982
4. Tables for clinicians to use to convert WAIS-R short forms;Booker;Journal of Clinical Psychology,1986
5. A within-family study of schizophrenia and a visible subpapillary plexus in the nailfold;Buchanan;Schizophrenia,1969