1. American Psychiatric Association.Diagnostic and Statistical Manual of Mental Disorders. 3rd edn (DSM III). Washington D.C.; American Psychiatric Association, 1980.
2. American Psychiatric Association.Diagnostic and Statistical Manual of Mental Disorders. 3rd edn revised (DSM III-R). Washington D.C.; American Psychiatric Association, 1987.
3. American Psyschiatric Association.Diagnostic and Statistical Manual of Mental Disorders. 4th edn (DSM IV). Washington D.C., American Psychiatric Association. 1994.
4. Biederman J, Newcorn J, Spirch S. Comorbidity of attention deficit hyperactivity disorder with conduct, depression, anxiety, and other disorders.Am J Psychiatry 1991; 148: 564–577.
5. Jensen PS, Martin D, Cantwell DP. Comorbidity in ADHD: Implications for research, practice and DSM-V.J Am Acad Child Adolesc Psychiatry 1997; 36: 1065–1079.