1. 1990 JCO study of orthodontic diagnosis and treatment procedures: part 2—breakdowns of selected variables;Gottlieb;J Clin Orthod,1991
2. Percentage swings in extraction frequencies;Turpin;Angle Orthod,1994
3. Forty-year review of extraction frequencies at a university orthodontic clinic;Proffit;Angle Orthod,1994
4. Treatment of nonskeletal problems in preadolescent children;Fields,1993
5. Stability and relapse of mandibular anterior alignment: first premolar extraction cases treated by traditional edgewise orthodontics;Little;Am J Orthod,1981