1. Tractor safety on slopes;Hunter;Agric. Eng.,1981
2. Tip angles for tractor sideways overturning from Norwegian test reports;Hunter,1982
3. Survey of overturning accidents in Scotland, 1964–1976;Owen,1977
4. Survey of overturning accidents in England and Wales, 1968–1978;Owen,1979
5. The effect of offset load and travel speed on tractor stability;Owen,1980