1. Uniform color scales*
2. New Color-Matching Ellipses
3. A. R.Robertson Comparison of the two uniform colour spaces proposed by CIE TC‐1.3 for study inProceedings of the CIE 18th Session (London) Publication CIE No. 36 Bureau Central de la CIE Paris 1976 pp.174–179.
4. Experimental studies by making use of color‐difference simulator;Kawakami Genro;Acta Chromat.,1977