1. American Psychiatric Association (APA) (2000). Diagnostic and Statistical Manual of Mental Disorders. Fourth Edition. Text Revision. Washington, D.C., APA.
2. World Health Organization (1992). ICD-10: The ICD-10 Classification of Mental and Behavioural Disorders: Clinical Descriptions and Diagnostic Guidelines. Geneva, WHO.
3. Mahe V, Balogh A. Long-term pharmacological treatment of generalized anxiety disorder. International Clinical. Psychopharmacology 2000;15:99–105
4. Anxiety Disorders Association of America (ADAA) (2004). Improving the diagnosis and treatment of generalized anxiety disorder: A dialogue between mental health professionals and primary care physicians. Silver Spring, ADAA
5. Lobo A, Campos R. Los trastornos de ansiedad en atención primaria. Madrid, EMISA 1997.