1. Posterior crossbites in the deciduous and mixed dentitions;Kutin;Am J Orthod,1969
2. An investigation into the prevalence of molar crossbite and some associated aetiological conditions;Day;Dent Pract,1971
3. An epidemiologic study of finger habits in preschool children as related to malocclusion, socioeconomic status, race, sex, and size of community;Infante;J Dent Child,1976
4. Epidemiologic survey of functional conditions of the masticatory system in Belgian children aged 3–6 years;de Vis;Comm Dent Oral Epidemiol,1984
5. Need for orthodontic intervention in five-year-old Finnish children;Heikinheimo,1987