1. Esthetics in Dentistry;Goldstein,1998
2. Esthetics of anterior fixed prosthodontics;Chiche,1996
3. Fundamentals of esthetics;Rufenacht,1990
4. A multidisciplinary approach to esthetic dentistry;Spear;Dent Clin North Am,2007
5. The glossary of prosthodontic terms: 9th Edition;J Prosthet Dent,2017