1. Björk, A., S. Helm: Prediction of the age of maximum puberal growth in body height. Angle Orthodont 37 (1967), 134–143.
2. Chertkow, S.: Tooth mineralization as an indicator of the puberal growth spurt. Amer. J. Orthodont. 77 (1980), 79–91.
3. Corruccini, R. S., R. H. Potter: Genetic analysis of occlusal variation in twins. Amer. J. Orthondont. 78 (1980), 140–154.
4. Demirijan, A., H. Goldstein, J. M. Tanner: A new system of dental age assessment. Hum. Biol. 45 (1973), 211–227.
5. Gravely, J. H., D. B. Johnson: Variations in the expression of hypodontia in monozygotic twins. Dent. Practic. 21 (1971), 212–220.