1. (1) CIE Publication No. 93 (1992)
2. (2) CIE Publication No. 12/2 (1977)
3. (3) Draft of the CIE publication "Recommendations for the Lighting of Roads for Motor and Pedestrian Traffic (1994)
4. (4) Dunbar, C., Trans. Illum. Engng. Soc. (London), 3 (1938)
5. (5) Boer, J. B. de, Proceeding of CIE, Stockholm (1951)