1. Suggested methods for the quantitative description of discontinuities in rock masses;Barton;Int J Rock Mech Min Sci Geomech Abstr,1979
2. Engineering rock mechanics: an introduction to the principles;Hudson;Appl Mech Rev,2002
3. A new version of the generalized Zhang-Zhu strength criterion and a discussion on its smoothness and convexity;Cai;Rock Mech Rock Eng,2021
4. Engineering classification of jointed rock masses;Bieniawski;Civil Engineer in South Africa,1973
5. Rmi – a rock mass characterization system for rock engineering purposes;Palmstrom,1995