1. Underground Excavations in Rock;Hoek,1980
2. A comparative evaluation of rock strength measures;Gunsallus;Int. J. Rock Mech. Min. Sci. & Geomech. Abstr.,1984
3. Rock mechanics laboratory testing in the context of a consulting engineering organisation;Hoek;Int. J. Rock Mech. Min. Sci. & Geomech. Abstr.,1977