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2. Sucking habits and their relation to posterior crossbite in 4-year-old children;Modéer;Scand J Dent Res,1982
3. Patterns of occlusion in 3-year-old Danish children;Kisling;Community Dent Oral Epidemiol,1976
4. Malocclusion and sucking habits of four-year-old children;Köhler;Acta Paed Scand,1973
5. The effect of finger-sucking on the occlusion: a review;Larsson;Eur J Orthod,1987