Zhang, L., and Einstein, H.H. (1998). Estimating the Mean Trace Length of Rock Discontinuities. Rock Mechanics and Rock Engineering, 31 (4), 217-235. doi:10.1007/s006030050022
Zhang, L., and Einstein, H.H. (1998). Estimating the Mean Trace Length of Rock Discontinuities. Rock Mechanics and Rock Engineering, 31 (4), 217-235. doi:10.1007/s006030050022