1. The theory of land locomotion (The mechanics of vehicle mobility);Bekker,1956
2. Off the road locomotion;Bekker,1960
3. Tractor design and tractive performance;Reece,1967
4. Drawbar performance of high-powered farm tractors with rear-wheel and four-wheel drive;Sonnen;J. Terramech.,1969
5. Four-wheel drive or rear-wheel drive for farm tractors;Sohne;J. Terramech.,1968