1. A study of the pattern and combinations of congenitally missing teeth in man;Brekhus;Journal of Dental Research,1944
2. Congenital dental anomalies occurring in 3,557 children;Clayton;Journal of Dentistry for Children,1956
3. Anomalies of the primary dentition;Menczer;Journal of Dentistry for Children,1955
4. Some abnormalities of the deciduous dentition;Leighton;Dental Record,1953
5. Supernumerary and congenitally missing primary teeth in Finnish children. An epidemiologic study;Jarvinen;Acta Odontologica Scandinavica,1981