1. Principles of Color Technology;Billmeyer,1981
2. Colorimetry;CIE Publication No. 15.2,1986
3. Restorative Dental Materials;Craig,1985
4. Color in Business, Science and Industry;Judd,1975
5. New Contributions to the Optics of Intensely Light-Scattering Materials. Part I;Kubelka;J Opt Soc Am,1948