1. Relapse in orthodontics;Adamson;Internat. D. J.,1958
2. Experimental findings on mesial relapse of maxillary first molars;Andreasen;Angle Orthodontist,1968
3. Malocclusion of the teeth;Angle,1907
4. Asymmetry in tooth size; a factor in the etiology, diagnosis and treatment of malocclusion;Ballard;Angle Orthodontist,1944
5. Hydrodynamic damping of tooth movement;Bien;J. D. Res.,1966