1. (1) CIE Proc. Vol. 2 Secretariat committee 3.2, Zürich (1955).
2. (2) CIE Publ. No. 16 (E-3.2) Daylight (1970).
3. (3) CIE Publ. No. 22 (TC-4.2) Standardization of Luminance Distribution on Clear Skies (1973).
4. (4) Nakamura, H. et al.: “Study on the Prediction of the Direct Daylight Factor basing upon the Representative Sky (Intermediate Sky), Part 1”, Summaries of the Technical Papers of Annual Meeting, Architectural Institute of Japan (1981), 213∼214. (in Japanese).
5. (5) Nakamura, H. et al.: “Study on the Prediction of the Direct Daylight Factor basing upon the Representative Sky (Intermediate Sky), Part 2”, Summaries of the Technical Papers of Annual Meeting, Architectural Institute of Japan (1981), 215∼216. (in Japanese).