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2. Statistical descriptions of rock properties and sampling;Baecher;Proc. U.S. Symp. Rock Mech., 18th,1977
3. Permeability of crystalline rock interpreted from measured orientations and apertures of fractures;Bianchi;Ann. Arid Zone,1968
4. Caldwell , J. A. The theoretical determination of the fluid potential distribution in jointed rocks Johannesburg, South Africa 1971