1. Differential force in orthodontic treatment;Begg;Am. J. Orthod.,1956
2. A vade mecum for the Begg technique;Cadman;Am. J. Orthod.,1975
3. A vade mecum for the Begg technique;Cadman;Am. J. Orthod.,1975
4. Cephalometric appraisal of the light wire technique;Williams,1965