1. Double teeth. A retrospective study of ‘geminated’ and ‘fused’ teeth in children.;Brook;British Dental Journal,1970
2. Numerical variations in primary dentition and their correlation with the permanent dentition.;Grahen;Odontologisk Revy,1961
3. Gemination, fusion, twinning and concrescence.;Levitas;Journal of Dentistry for Children,1965
4. Aplasia, supernumerary teeth and fused teeth in the primary dentition.;Ravn;Scandinavian Journal of Dental Research,1971
5. Dental anomalies of number, form and size: Their prevalence in British schoolchildren.;Brook;Journal of International Association of Dentistry for Children,1974