1. Bjørnskau, T., 2003. Risiko i trafikken 2001–2002. Rapport 694. Transportøkonomisk institutt, Oslo.
2. Bjørnskau, T., 2008. Risiko i trafikken 2005–2007. Rapport 986. Transportøkonomisk institutt, Oslo.
3. Models for predicting accidents at junctions where pedestrians and cyclists are involved. How well do they fit?;Brüde;Accident Analysis and Prevention,1993
4. Eenink, R., Reurings, M., Elvik, R., Cardoso, J., Wichert, S., Stefan, C., 2007. Accident prediction models and road safety impact assessment: recommendations for using these tools. Report RI-SWOV-WP2-D2-F. SWOV Institute for Road Safety Research, Leidschendam.
5. Incomplete accident reporting. Meta-analysis of studies made in 13 countries;Elvik;Transportation Research Record,1999