1. Publication CIE No. 15(E-1. 3.1), 1971; Colorimetry. Paris: Bureau Central de la CIE; 1970.
2. Publication CIE No. 15.2, Colorimetry, 2nd ed.; 1986.
3. CIE Method for Calculating Tristimulus Values
4. CIE. Publication No. S002, CIE standard colorimetric observers; 1986.
5. CIE. Publication No. S005, CIE standard illuminants for colorimetry; 1998.