1. Genetic aspects of anomalous tooth development;Dixon,1976
2. Clinician's view of hypodontia;Jorgenson;J Am Dent Assoc,1980
3. The management of patients with severe hypodontia;Hobkirk;J Oral Rehabil,1980
4. Numerical variations in primary dentition and their correlation with the permanent dentition;Grahnen;Odont Rev,1961
5. Hypodontia in the permanent dentition: a clinical and genetical study;Grahnen;Odont Rev,1956