1. Økonomisk verdsetting av velferdstap ved trafikkulykker;Elvik,1993
2. Extent and some implications of incomplete accident reporting;Hauer;Transportation Res. Record,1988
3. Underrapportering av trafikkulykker;Borger,1991
4. Under-reporting of road traffic accidents;James;Traffic Engng Control,1991
5. Long-term Effects of Traffic Accidents;Thorson,1975