References
- Committee on Recommendations of Quality and Quantity of Illumination, “The predetermination of contrast rendition factors for the calculation of equivalent sphere illumination”, RQQ Report No. 5, Journal of the Illuminating Engineering Society, Vol. 2, No. 2, January 1973, p. 149.
- NgaiPeter Y. “The optimal design of a luminous environment in terms of visual performance potential,” Master's Thesis, University of Colorado, December 1973, p. 17.