1. Cephalometric analysis of treatment with cervical anchorage;Blueher;Angle Orthod.,1959
2. Buchner, H. J.: Effect of facial growth upon orthodontic treatment, Angle Orthod. 37: 59–80, 1067.
3. Inhibition or Stimulation of vertical growth of the facial complex;Creekmore;Angle Orthod.,1967
4. Extraoral force, facts and fallacies;Graber;Am. J. Orthod.,1955
5. Bony profile changes resulting from cervical traction compared with those resulting from intermaxillary elastics;Hanes;Am. J. Orthod.,1959