1. Studies of the regularity of traffic flow on roads in the German Federal Republic;Feuchtinger,1960
2. Relationship of accident rates and accident involvements with hourly volumes;Gwynn;Traffic Quart.,1967
3. Huk-Verband (Berater für Schadenverhütung) (196 ). Accidents on the M1 London-Birmingham motorway-comparison with the Frankfurt-Mannheim motorway. (In German) Strassenbau, Verkehrstechnik und Verkehrssicherheit Vol. 10. HUK-Verband, Cologne.
4. Traffic accidents and traffic flow on the Frankfurt-Mannheim motorway—investigation of the relationship between traffic accidents and traffic flow;Leutzbach,1966
5. Simplification of police accident reporting and its effect on local accident studies;Pfundt,1963