1. Comorbidity in anxiety and depressive disorders: A helplessness-hopelessness perspective;Alloy,1990
2. Diagnostic and statistical manual of mental disorders,1987
3. The epidemiology of depression in children and adolescents;Angold,1995
4. The classification of anxiety disorders;Barlow,1987
5. Comorbidity and depression among the anxiety disorders: Issues in diagnosis and classification;Barlow;Journal of Neurvous and Mental Disease,1986