1. Observational studies on fissure patterns in Creataceous sediments of south-east England;Fookes;Geotech.,1969
2. The mechanics of discontinua or elastic mechanics in rock problems;Trollope,1968
3. Fundamentals of Rock Mechanics;Jaeger,1969
4. Rock Slope Engineering;Hoek,1974
5. Geological factors significant to the stability of slopes cut in rock;Piteau,1970