1. Malocclusion of the teeth;Angle,1907
2. Malocclusion of the teeth regarded as a problem in connection with the apical base;Lundstrom;Int J Orthod,1925
3. The principles & art of retention;Hawley;Int J Orthod,1925
4. Failures;Mershon;Int J Orthod and Oral Surg,1936
5. Stability of intercanine width, overbite and overjet correction;Bishara;Am J Orthod,1973