1. The prevalence of malocclusion in Swedish schoolchildren;Thilander;Scand J Dent Res,1973
2. Prevalence of malocclusion in a medieval and modern Danes contrasted;Helm;Scand J Dent Res,1979
3. An epidemiologic transition in dental occlusion in world populations;Corruccini;Am J Orthod,1984
4. Occurrence of malocclusion in attritive environment: a study of a skull sample from southwest Finland;Varrela;Scand J Dent Res,1990
5. Secular trends in malocclusion in Austrian men;Weiland;Eur J Orthod,1997