1. Soil Cutting and Tillage;McKyes,1985
2. The relationship between the mechanical properties of soil and the performance of simple cultivation implements;Payne;J. agric. Engng Res.,1956
3. The mechanics of soil cutting blades;Osman;J. agric. Engng Res.,1964
4. The fundamental equation of earth-moving mechanics;Reece,1964
5. Similitude Techniques Applied to Performance Studies of Cultivator Sweeps;Sirohi;ASAE Trans.,1969