1. Malocclusion of the teeth;Angle,1907
2. A review of the retention problem;Riedel;Angle Orthod,1960
3. Physiologic recovery following orthodontic treatment;Horowitz;Am J Orthod,1969
4. Posttreatment and postretention changes following orthodontic therapy;Gardner;Angle Orthod,1976
5. Stability and relapse of mandibular anterior alignment—first premolar extraction cases treated by traditional edgewise orthodontics;Little;Am J Orthod,1981