1. Bierich, J. R.: Entwicklungsverzögerung. Mschr. Kinderheilk. 123 (1975), 301.
2. Björk, A.: Timing of interceptive orthodontic measures based on stages of maturation. Trans. Europ. Orthod. Soc. (1972), 61.
3. Björk, A., S. Helm: Prediction of the age of maximum puberal growth in body height. Angle Orthodont. 37 (1967), 134.
4. Blunck, W.: Grundlagen der Therapie des konstitutionellen Hochwuchses. Mschr. Kinderheil. 123 (1975), 324.
5. Brown, T., M. J. Barret, K. C. Grave: Facial growth and skeletal maturation at adolescence. Tandlaegebladet 75 (1971), 1211.