1. ‘Rock fracture around mining excavations’, Proc. Fourth International Conference on Strata Control and Rock Mechanics, Columbia University, N. Y., 1964, pp. 334-348.
2. A theoretical and experimental evaluation of the Griffith theory of brittle fracture
3. Fracture growth around openings in large blocks of rock subjected to uniaxial and biaxial compression
4. ‘Discrete fracture propagation in rock: laboratory tests and finite element analysis’, Ph. D. Dissertation, University of Colorado, Boulder, Colorado, 1977.
5. ‘The strength ratio effect in the fracture of rock structures’, Proc. 20th U. S. Symposium on Rock Mechanics, Austin, Texas, 1979, pp. 153-169.