References
- Illuminating Engineering Society of North America. 1984. RP-23–1989. Recommended practice for the calculation of daylight availability. J of the IES 13(no. 4):381.
- JonesJ.R., and NeidartJ.J. 1957. Algebraic ineterrflectance computations. Illum Engineering LII(no. 4):199.
- Illuminating Engineering Society of North America. 1984. IES Lighting Handbook: 1984 Reference Volume. New York: IESNA: 9–4.