1. Thompson WJ. Modern Begg: a combination of Begg and straight wire appliance and techniques. In Graber TM, Swain BF, Current Orthodontic and Techniques. St Louis: Mosby, 1985; 731-733.
2. Mollenhauer B. Treatment planning using differential diagnosis. Aust OrthodJ 1989; 11(2): 117-118.
3. Stockli PW, Teusher UM. Combined activator headgear orthodontics in Graber TM, Vanarsdall RL Orthodontics Current Principles and Techniques St Louis: Mosby 1994; 437-441.
4. Thompson JR. The Individuality of the patient in facial skeletal growth. Part 2. AmJ Orthod 1994; 105:117.
5. Begg, PR. Begg Orthodontic Theory and Technique. 1st Edn Philadelphia: Saunders, 1965; 132.