1. The epidemiology of common fears and phobia;Agras;Comprehensive Psychology,1969
2. American Psychiatric Association (1994). Diagnostic and.statistical manual of mental disorders (4th ed.). Washington, DC: American Psychiatric Association
3. Arrindell, W.A., & Ettema, J.H.M. (1986). SCL-90; Handleiding bij een multidimensionele psychopathologie-indicator. Lisse, The Netherlands: Swets Test Services
4. Phobic dimensions: 1. Reliability and generalizability across samples, gender and nations;Arrindell;Advances in Behaviour Research and Therapy,1984
5. Factor analysis and reduction of a Fear Survey Schedule among dental phobic patients;Berggren;European Journal of Oral Sciences,1995