1. G. Wyszecki and W. S. Stiles,Color Science: Concepts and Methods, Quantitative Data, and Formulae, 2nd ed. (John Wiley & Sons, New York, 2000), pp. 4–11, 28, 146, 762.
2. CIE 15:2004,Colorimetry, 3rd ed. [Commission Internationale de l'Eclairage (International Commission on Illumination), CIE Central Bureau, Vienna, Austria, 2004].
3. The CIE does not define the “luminous reflectance factor” We introduced the adjective “luminous” to distinguish it from its radiometric counterpart (private communications with Dr Yoshi Ohno, NIST).
4. CIE Publication No. 17.4,International Lighting Vocabulary, [Commission Internationale de l'Eclairage (International Commission on Illumination), 1987]. A joint publication with the International Electrotechical Commission, IEC Publication 50(845), International Electrotechnical Vocabulary, Chapter 845: Lighting (1987).
5. CIE Publication No. 69,Methods of Characterizing Illumination and Luminance Meters[Commission Internationale de l'Eclairage (International Commission on Illumination) (1987)].