1. Evaluation of space-closing techniques with the aid of laminagraphie cephalometrics;Poulton;Am. J. Orthodontics,1968
2. Elastic thread with the Begg technique;Barrer;J. Pract. Orthodontics,1967
3. Begg non-extraction treatment;Swain;J. Pract. Orthodontics,1968
4. The diagnostic line;Williams;Am. J. Orthodontics,1969