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2. Foundations of risk analysis;Aven,2003
3. Approaches to the risk of riding motorcycles: reflections on the problem of reconciling statistical risk assessment and motorcyclists' own reasons for riding;Bellaby,2001
4. Violence, racism and adolescent gangs: Prevention and mitigation;Bjørgo,1999
5. Accidents with mopeds and light motorcycles;Bjørnskau,2004