1. BMDP statistical software manual;BMDP Inc.,1988
2. Evaluation of the bicycle helmet wearing law in Victoria during its first 12 months;Cameron,1992
3. Do bicycle safety helmets reduce severity of head injury in real crashes?;Dorsch,1984
4. The risks of bicyclist accident involvement Report no. 2;Drummond,1988
5. The behaviour and crash involvement risk of child pedestrians and bicyclists: A traffic exposure study;Drummond,1991