1. A posteroanterior cephalometric evaluation of craniofacial asymmetry;Letzer;Angle Orthod,1967
2. A frontal asymmetry analysis;Grummons;J Clin Orthod,1987
3. Development of posteroanterior cephalometric analysis for the diagnosis of facial asymmetry;Hwang;J Korean Dent Assoc,2004
4. Enlargement and distortion in cephalometric radiography: compensation tables for linear measurements;Bergersen;Angle Orthod,1980
5. The cephalometric projection: part II;Ahlqvist;Dentomaxillofac Radiol,1983