1. Removable retainer;Hawley;Int J Orthod,1919
2. Treatment of malocclusion of teeth;Angle,1907
3. Dr. Richard A. Riedel on retention and relapse;Riedel;J Clin Orthod,1976
4. Oral deformities;Kingsley,1880
5. Mandibular dental arch form and dimension. Treatment and posttreatment changes;Shapiro;Am J Orthod,1974