1. Bedeutung der röntgenfern-und abstandsaufnahme für die diagnostik der kieferanomalien;Hofrath;Fortschitte der Orthodontik,1931
2. A new x-ray technique and its application to orthodontia;Broadbent;Angle Orthod,1931
3. Orientation-sella-nasion or Frankfort horizontal;Ricketts;Am J Orthod,1976
4. Proffit WR, Fields HW Jr, Sarver DM. Contemporary Orthodontics. 4th ed. St. Lois, MO: Elsevier Mosby; 2007.
5. Variations in facial relationships; Their significance in treatment and prognosis;Downs;Am J Orthod,1948