1. Rolf Kuehni Analysis of returned questionnaires of ISCC Problem Subcommittee 34 “Color Difference Problems,” ISCC Newsletter JulyAugust, 1973 1 2
2. FMC color-difference formulas: Clarification concerning usage;Chickering;J. Opt. Soc. Amer.,1971
3. Photoelectric color difference meter;Hunter;J. Opt. Soc. Amer.,1958
4. Rapid graphical computation of small color differences;Simon;Amer. Dyestuff Reptr.,Feb. 1958
5. The Adams-Nickerson colour-difference formula;McLaren;J. Soc. Dyers Colourists,1970