1. Fundamentals of Rock Mechanics;Jaeger,1971
2. State of stress in the earth's crust;McGarr;Annu Rev Earth Planet Sci,1978
3. Variation of rock stresses with depth at a Canadian iron mine;Herget;Int. J. Min. Rock Mech. Min. Sci. & Geomech. Abs.,1973
4. Regional stresses in the Canadian shield. In: proc. 13th can. Rock mech. Symp;Herget;Underground Rock Engineering CIM Special,1980
5. Geothermal Energy In the UK, Review Of the British Geological Survey's Programme 1984-1987, ETSU G 131F,1988