1. Soil dynamics research at Deere Co.;Wismer,1969
2. Performance of plane soil cutting blades in clay;Wismer,1970
3. The mechanics of soil cutting blades;Osman;J. Agri. Engng Res.,1964
4. Soil failure under inclined loads—1;Harrison;J. Terramechanics,1973
5. The present state of the theory of soil cutting;Hettiaratchi;J. Terramechanics,1965