1. A nonlinear deformation modulus based on rock mass classification;Nicholson;Int J Min Geol Eng,1990
2. Mehrotra VK. Estimation of engineering parameters of rock mass. PhD thesis, Department of Civil Engineering, University of Roorkee, India, 1992.
3. Palmstrom A. RMi—a system for characterization of rock masses for rock engineering purposes. PhD thesis, University of Oslo, 1995.
4. Practical estimates of rock mass strength;Hoek;Int J Rock Mech Min Sci,1997
5. Read SAL, Richards LR, Perrin ND. Applicability of the Hoek–Brown failure criterion to New Zealand greywacke rocks. In: Proceedings of the ninth international congress on rock mechanics, Vouille G, Berest P, editors, vol. 2, Paris, 1999. p. 655–60.