References
- RokoszF.,SausvilleJ. W., and Van BroekhovenJ. “Incandescent lamp color with high-intensity discharge lamps”, Journal of the Illuminating Engineering Society, Vol. 2, No. 1, Oct., 1973, p. 95. U. S. Patent 3,825,792 July, 1974.
- van der StapA. H. M. and ter VrugtJ. W., Lichtechnische Gemeinschaftstagung, RAI Kongresszentrum, Amsterdam, June 13–16, 1978.
- HoffmanM. V. “Improved color rendition in high pressure mercury vapor lamps”, Journal of the Illuminating Engineering Society, Vol. 6, No. 2, Jan. 1977, p. 89. U. S. Patent 4,034,257, July 1977.