1. Symmetrical three-dimensional soil failure;Hettiaratchi;J. agric. Eng Res.,1967
2. Soil failure with narrow tines;Godwin;J. agric. Eng Res.,1977
3. The cutting of soil by narrow blades;McKyes;J. Terramechanics,1977
4. A soil-tool model based on limit equilibrium analysis;Perumpral;Trans. Am. Soc. agric. Engrs,1983
5. Finite element analysis of plane soil cutting;Yong;J. Terramechanics,1977