1. National Bureau of Standards Applied Mathematics Series;M. Abramowitz,1964
2. Carnahan, B., Luther, H. A., and Wilkes, J. O., 1969, Applied numerical methods: John Wiley & Sons, New York, N.Y.
3. Einstein, H. H., and Baecher, G. B., 1983, Probabilistic and statistical methods in engineering geology; specific methods and examples, Part 1, Exploration: Rock Mech. Rock. Eng., v. 16, p. 39?72.
4. Kulatilake, P. H. S. W., Finlay, R. E., and Ghosh, A., 1985, Effect of variability of joint orientation and strength on factor of safety of wedge stability, proceedings of the International Symposium on Fundamentals of Rock Joints, Sweden, Sept. 1985.
5. Mahtab, M. A., Bolstad, D. D., Alldredge, J. R., and Shanley, R. J., 1972, Analysis of fracture orientations for input to structural models of discontinuous rock, Bureau of Mines, RI 7669, 76 p.