1. X-Z Planes in the 1931 ICI System of Colorimetry1
2. Billmeyer, F. W. Jr. Fundamental processes leading to the appearance of foods. Objective methods for food evaluation — a symposium. pp.229Washington, D.C.: U. S. Army Natick Research and Development Command, Committee on Food Stability and Personnel Supplies, National Academy of Science/National Research Council.
3. Color-Order System Predicting Constant Hue