1. How dentogenic restorations interpret the sex factor;Frush;J Prosthet Dent,1956
2. Denture esthetics;Young;J Prosthet Dent,1956
3. Natural appearance for the individual denture patient;Krajicek;J Prosthet Dent,1960
4. The principles of visual perception and their clinical application to denture esthetics;Lombardi;J Prosthet Dent,1973
5. Methods used to select artificial anterior teeth for the edentulous patient: a historical overview;Sellen;Int J Prosthodont,1999