1. The diagnostic and statistical manual of mental disorders;American Psychiatric Association,1994
2. Epidemology and prevalence of psychopathology in people with mental retardation;Borthwick-Duffy;Journal of Consulting and Clinical Psychology,1994
3. A normative study on the Diagnostic Assessment for the Severely Handicapped (DASH) scale;Hamilton,1995
4. The Diagnostic Assessment for the Severely Handicapped-II;Matson,1995
5. A scale for evaluating emotional disorders in severely and profoundly mentally retarded persons;Matson;British Journal of Psychiatry,1991