1. [1] Bennett JC, McLaughlin RP. Orthodontic treatment mechanics and the pre-adjusted appliance. London: Wolfe Medical Publishing 1993.
2. [2] Ballard ML. Asymmetry in tooth size: a factor in the etiology, diagnosis and treatment of malocclusion. Angle Orthod 1944;14(3):67-70.
3. Tailored occlusion with the anterior coefficient;Neff;Am J Orthod,1949
4. [4] Steadman SR. The relation of upper anterior teeth to lower anterior teeth as present on plaster models of a group of acceptable occlusions. Angle Orthod 1952;22:91- 7.
5. [5] Lundstrom A. Intermaxillary tooth width ratio and tooth alignment and occlusion. Acta Odontol Scand 1955;12(3- 4):265-92.