1. Pathology of the dental hard tissues;Pindborg,1970
2. Anomalous tooth development; Case report of gemination and twinning;Tannenbaum;Oral Surg,1963
3. Gemination, fusion, twinning and concrescence;Levitas;J Dent Child,1965
4. A retrospective study of “geminated” and “fused” teeth in children;Brook;Br Dent J,1970
5. Congenital dental anomalies occurring in 3,557 children;Clytin;J Dent Child,1956