1. Postretention study:- mcidenc and stability of rotated teeth in humans;Swanson;Angle Orthod,1975
2. A long term assessment of the clinical efficacv of the circumferential supracrestal fiberotomy;Rye,1983
3. Stability and relapse of maxillary anterior alignment: a- postretention study of premolar extraction cases treated by traditional edgewise orthodontics;Allred,1986
4. Stability and relapse of mandibular anterior alignment—first premolar extraction cases treated by traditional edgewise orthodontics;Little;Am J Orthod,1981
5. Long-term assessment of orthodontic relapse;Sadowsky;Am J Orthod,1982