1. Facial and denture changes during orthodontic treatment as analysed from the temporomandibular joint;Rickets;Am J Orthodont,1955
2. Physiologic timing of orthodontic treatment;Singer;Angle Orthod,1980
3. Radiographic evaluation of skeletal maturation: a clinically oriented method based on hand-wrist films;Fishman;Angle Orthod,1982
4. Radiographic Atlas of Skeletal Development of the Hand and Wrist;Greulich,1959