1. Adler, L. (1970): Double elasticity in drill cores under flexure. Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 7, 357?370.
2. Ayari, M. L. (1991): Simulation of mining excavation. Internal Report, Department of Geological Engineering, University of Manitoba.
3. Chen, R., Stimpson, B. (1991): Material bimodularity ? theoretical and numerical solutions. Internal Report, Department of Geological Engineering, University of Manitoba.
4. Chen, R., Ayari, M. L., Stimpson, B. (1991): Influence of material bimodularity on the behavior of underground mining structures. In: Proc., 13th Canadian Congress of Applied Mechanics, Winnipeg, Manitoba, 720?721.
5. El-Tahan, W. W., Staab, G. H., Advani, S. H., Lee, J. K. (1989): Structural analysis of bimodular materials. J. Engng. Mech. 115, 963?981.