1. Attitude of a tractor on sloping land;Gilfillan;J. agric. Engng Res.,1967
2. Tractor behaviour during motion uphill—I. Factors affecting behaviour. II. Comparisons of behaviour;Gilfillan;J. agric. Engng Res.,1970
3. Tractor behaviour during motion—I. Factors affecting behaviour. II. Comparisons of behaviour;Gilfillan;J. agric. Engng Res.,1970
4. Hangstabilität landwirtschaftlicher Fahrzeuge. Forschungsberichte der Bundersversuch-und Prüfungsanstalt fur landwirtschaftliche Maschinen und Geräte;Reichman,1972
5. Dynamic stability of tractors against overturning;Daskalov;Selskostop. Tekh.,1971