1. The elements of esthetics—application of color science;Preston,1983
2. History of the Munsell color system, vol. 7(5);Nickerson,1969
3. Human-eye versus computerized color matching;Yap;Oper Dent,1999
4. The measurement of appearance;Hunter,1987
5. Evaluations by dentists and patients concerning the color of porcelain fused-to-metal restorations;Kawaragi;Dent J Iwate Med Univ,1990