1. Esthetics and its relation to orthodontic therapy;Reidel;Angle Orthod,1950
2. Perioral profile changes in orthodontic treatment;Bloom;Am J Orthod,1961
3. A cephalometric study of the soft tissue changes during and after orthodontic treatment;Angelle,1973
4. Facial esthetics in orthodontic treatment with and without extractions;Stromboni;Eur J Orthod,1979
5. Orthodontics and the facial profile;DeLaat,1974