1. Method to analyze the stability of rock slopes with and without additional loading (in German);Wittke;Felsmechanick und Ingenieurgeolgie,1965
2. Graphical stability analysis of slopes in jointed rock;John;J Soil Mech Found Div (ASCE),1968
3. Stability of rock slopes, a three-dimensional study;Londe;J Soil Mech Found Div (ASCE),1969
4. Approach to complete limit equilibrium analysis for rock wedges – the method of “artificial supports”;Chan;Rock Mech,1981
5. Rock slope engineering;Hoek,1981