1. (1) Institute for Traffic Accident Research and Data Analysis: Trends in number of traffic accidents occurrences for daytime and nighttime, Traffic statistics, 1999 edition, p. 21 (1999).
2. (2) Institute for Traffic Accident Research and Data Analysis: Number of traffic accidents occurrences for road profile, daytime and nighttime, Traffic statistics, 1999 edition, p. 49 (1999).
3. (3) Recommendations for The Lighting of Roads for Motor and Pedestrian Traffic, CIE Technical Report 115 (1995).
4. (4) Road Lighting as an Accident Countermeasure, CIE Technical Report No. 93 (1992).