1. Numerical variations in primary dentition and their correlation with the permanent dentition;Grahnén;Odontologisk Revy,1961
2. Aplasia, supernumerary teeth and fused teeth in the primary dentition;Ravn;Scandinavian Journal of Dental Research,1971
3. Supernumerary and congenitally missing primary teeth in Finnish children;Järvinen;Acta Odonlologica Scandinavica,1981
4. Hypodontia, hyperodontia, and double formation of primary teeth in Iceland;Magnusson;Acta Odonlologica Scandinavica,1984
5. Solitary maxillary central incisor and short stature;Rappaport;Journal of Pediatrics,1977