1. Single arch treatment with the Kloehn headgear: A cephalometric evaluation;Boatwright,1968
2. A cephalometric analysis of the stability and type of movement obtained in Class II, Division 1 malocclusions treated with extraoral forces;Bernardi,1956
3. Cephalometric analysis of treatment with cervical anchorage;Blueher;Angle Orthodontist,1959
4. Analysis of changes in molar relationships by means of extra-oral anchorage (headcap) in treatment of malocclusion;Epstein;Angle Orthodontist,1948
5. Mndibular response to headgear therapy and its clinical significance;Funk;Am. J. Orthodontics,1967