1. An interpretation of Angle's classification of malocclusion of the teeth supported by evidence from comparative anatomy and evolution;Hellman;Dent Cosmos,1920
2. Determination of the angle of rotation of the upper first permanent molar to the median raphe of the palate in different types of malocclusions;Friel;Dent Practit,1959
3. The problem of the rotated maxillary first permanent molar;Lamons;Am J Orthod,1961
4. Precision lingual arches: active applications;Burstone;J Clin Orthod,1989
5. Measuring molar rotation;Biedka;J Maxillofac Orthop,1969