1. V. N. Rodionov, I. A. Sizov, and V. M. Tsvetkov,Principles of Geomechanics [in Russian], Nedra, Moscow (1986).
2. I. V. Baklashov,Deformation and Breakdown of Rock Masses [in Russian], Nedra, Moscow (1988).
3. A. H. Cottrel,Dislocations and Plastic Flow in Crystals, Clarendon Press, Oxford (1953).