1. Calculation of the stability of earth dams;Fellenius,1936
2. The use of the slip circle in the stability analysis of earth slope;Bishop;Geotechnique,1955
3. An examination of the methods of calculating the stability of slopes;Kenney;MSc Thesis, Imperial College,1956
4. Stability analysis of slopes with dimensionless parameters;Janbu,1957
5. The analysis of the stability of general slip surfaces;Morgenstern;Geotechnique,1965