1. ANSI (1967). “American Standard Nomenclature and Definitions for Illuminating Engineering,” ANSI Publ. Z7.1.
2. Radiometric Quantities, Symbols, and Units
3. CIE (1970). “International Lighting Vocabulary.” CIE Publ. No. 17 (E-1.1). International Commission on Illumination (CIE), Paris, France.
4. CIE (1977). CIE Tech. Rep. Publ. 38, TC-2,3.