1. Barton, John J.: Personal communication, Minneapolis, Minn., 1968.
2. The direction of facial growth from infancy to adulthood;Bergensen;Angle Orthodont.,1966
3. The significance of growth changes in facial patterns in relationship to changes in occlusion;Björk;Dent. Record,1951
4. Sutural growth of the face studied by the implant method;Björk;Tr. Europ. Orthodont. Soc.,1964
5. The biomechanics of tooth movement;Burstone,1962