1. A social perspective on need and demand for orthodontic treatment;Jenny;Int Dent J,1975
2. The public health interest in assessment for orthodontic treatment;Foster;J Public Health Dent,1979
3. The prevalence of malocclusion in Swedish schoolchildren;Thilander;Scand J Dent Res,1973
4. Frequency of malocclusion and need of orthodontic treatment in 10-year-old children in Gothenburg;Ingervall;Swed Dent J,1972
5. The need for orthodontic treatment;Prahl-Anderson;Angle Orthod,1978