1. A cephalometric study of the soft tissue changes during and after orthodontic treatment;Angelle;Trans. Eur. Orthod. Soc.,1973
2. Malocclusion of the teeth;Angle,1907
3. Age and sex differences in the dentofacial changes following orthodontic treatment and their significance in treatment planning;Baum;Am. J. Orthod.,1961
4. Perioral profile changes in orthodontic treatment;Bloom;Am. J. Orthod.,1961
5. The integumental profile;Burstone;Am. J. Orthod.,1958