1. and , Color Science: Concepts, Methods, Quantitative Data and Formulas, Wiley, New York, 1967.
2. Swedish Colour Center Foundation, The NCS Colour Order and Scaling System: Philosophy, Concept, Development and Usage, Box 45020, 10430 Stockholm 45, Sweden.
3. Museum of HOLOGRAPHY
4. Colorimetric data for samples of OSA uniform color scales