1. The integumental profile;Burstone;Am. J. Orthod.,1958
2. Variations in facial relationships: Their significance in treatment and prognosis;Downs;Am. J. Orthod.,1948
3. Natural headposition; a basic consideration in the interpretation of cephalometric radiographs;Moorrees;Trans. Europ. Orthod. Soc.,1958
4. A concept of facial esthetics;Peck;Angle Orthod.,1970
5. Esthetics and its relation to orthodontic therapy;Riedel;Angle Orthod.,1950