1. A morphometric analysis of the posed smile;Ackerman;Clin Orthod Res,1998
2. Smile analysis and design in the digital era;Ackerman;J Clin Orthod,2002
3. An esthetic evaluation of lip-teeth relationships present in the smile;Hulsey;Am J Orthod,1970
4. An evaluation of smiles before and after orthodontic treatment;Mackley;Angle Orthod,1993
5. The smile line as a guide to anterior esthetics;Miller;Dent Clin North Am,1989