1. Variation in facial relationships: their significance in treatment and prognosis;Downs;Am J Orthod,1984
2. Standardized x-ray cephalographics;Margolis;Am J Orthod Oral Surg,1940
3. The Frankfort-mandibular incisor angle (FMIA) in orthodontic diagnosis, treatment planning and prognosis;Tweed;Angle Orthod,1954
4. Cephalometrics for you and me;Steiner;Am J Orthod,1953
5. Planning treatment on the basis of facial pattern and an estimate of its growth;Ricketts;Angle Orthod,1957