1. Frankfort mandibular incisor angle in orthodontic diagnosis, treatment planning and prognosis;Tweed;Angle Orthod,1954
2. Cephalometrics in clinical practice;Steiner;Angle Orthod,1959
3. Orthodontic diagnosis and planning;Ricketts,1982
4. Differential premolar extractions;Steyn;Am J Orthod Dentofacial Orthop,1997
5. The effect of premolar extraction;Luppanapornlarp;Angle Orthod,1993