1. Hakeberg M Dental anxiety and health. A prevalence study and assessment of treatment outcomes Göteborg, Sweden University of Gothenburg 1992
2. Hägglin C Dental anxiety in a Swedish city population of women: a cross-sectional and longitudinal study of prevalence, dental care utilisation and oral and mental health factors Göteborg, Sweden University of Gothenburg 2000
3. Dental anxiety among 18-yr-olds in Norway. Prevalence and related factors;Skaret;Eur J Oral Sci,1998
4. Normative data for Corah's Dental Anxiety Scale (DAS) for the Norwegian adult population;Neverlien;Community Dent Oral Epidemiol,1990
5. Prevalence and characteristics of dental anxiety in Danish adults;Moore;Community Dent Oral Epidemiol,1993