References
- IES Testing Procedures Committee, “IES Guide for Calibration of Photoelectric Control Devices”, Journal of the Illuminating Engineering Society, Vol. 4, No. 1, Oct. 1974, p. 69.
- KaufmanJ. E. and ChristensenJ. F. (Editors), IES Lighting Handbook, 1984 Reference Volume, New York: Illuminating Engineering Society of North America, 1984, Section 5, p. 5–27.