1. Driver behavior and probability of detection on roads with temporary 30kmh speed limit;Åberg,1989
2. Övervakning i tätort;Åberg,1989
3. An investigation into the consistency of driver's speed choice;Ahlin,1979
4. A review of the literature on police traffic law enforcement;Armour;Australian Road Research Board,1984
5. Trafikksikkerhedshandbok;Elvik,1989