1. Bury, K. V. (1975): Statistical Models in Applied Science. New York: Wiley & Sons.
2. Dershowitz, W., Baecher, G., Einstein, H. H. (1979): Prediction of Rock Mass Deformability. Proc. 4th I. S. R. M. Congress, Montreux1, 605?611.
3. Duncan, N., Hancock, K. E. (1966): The Concept of Contact Stress in Assessment of the Behaviour of Rock Mass as Structural Foundations. Proc. 1st I. S. R. M. congress, Lisbon2, 537?542.
4. Goodman, R. E. (1976): Methods of Geological Engineering in Discontinuous Rocks, St. Paul: West Publishing.
5. Greenwood, J. A., Tripp, J. H. (1971): The Contact of Two Nominally Flat Rough Surfaces. Proc. Inst. Mech. Engrs.185, 625?633.