References
- LewinI., and HeinischR. 1988. Luminance calculations for tunnel lighting systems. J of the IES 17(no. 1).
- KaufmanJ., and ChristiansenJ. eds. 1987. IES Lighting Handbook: 1987 Reference Volume. New York: Illuminating Engineering Society of North America.
- Committee on Recommendations for Quality and Quantity of Illumination of the IES. 1973. The predetermination of contrast rendition factors for the calculation of equivalent sphere illumination. J of the IES 2: 149.