1. Research on street and highway lighting with particular reference to their effect on accidents;Christie;Annual Conf. of the Institution of Municipal Engineers,1966
2. Fixed illumination for pedestrian protection—users manual;Freedman,1975
3. Mathematical Statistics;Freund,1971
4. Specialized illumination systems for pedestrian crosswalks;Janoff;Lighting Design & Application,1975
5. Pedestrian risk in or near pedestrian crossings;Jorgenson;Rådet For Trafiksikkerhedsforskning, Rapport 7,1971