1. KaufmanJ.E, and HaynesH., eds. IES Lighting Handbook-1981 Application Volume, Illuminating Engineering Society of North America, New York, 1981, pp. 2–3 to 2–24.
2. WyszeckiG., and StilesW.S., Color Science: Concepts and Methods, Quantitative Data and Formulas, Wiley, New York, 1967, pp. 240–252.
3. v. HelmholtzH.L.F., Handbuch der physiologischen Optik, 2nd edition, L. Voss, Hamburg and Leipzig, 1896, p. 440.
4. Über den Helligkeitsvergleich verschiedener Farben