1. Asymmetry in Tooth Size: A Factor in the Etiology, Diagnosis, and Treatment of Malocclusion;Ballard;Angle Orthodontist,1944
2. Descriptive Anatomy of the Human Teeth;Black,1902
3. Disharmony in Tooth Size and Its Relation to the Analysis and Treatment of Malocclusion;Bolton;Angle Orthodontist,1958