1. International Standard ISO 2813, “Paint and Varnishes-Measurements of Specular Gloss of Nonmetallic Paint Films at 20°, 60°, and 85°,” International Organization for Standardization, 1978.
2. “Standard Test Method for Specular Gloss, ASTM D 523,” American Society for Testing and Materials, West Conshohocken, PA, 1995.
3. Commission International de l’Eclairage,International Lighting Vocabulary, Colorimetry, 2nd Ed., Publ. No. 15.2 (1986).
4. Hunter, R.S. and Harold, R.W.,The Measurement of Appearance, 2nd Ed., John Wiley & Sons, New York, 1987.
5. Hsia, J.J., “The NBS20-, 60-, and 85-Degree Specular Gloss Scales,” NIST Tech. Note 594-10 (1975).