1. Anbalagan R, Sharma S, Raghuvanshi TK (1992) Rock mass stability evaluation using modified SMR approach Proceedings of 6th National Symposium on Rock Mechanics, Bangalore, India, pp. 68–258
2. ASTM D5731–08 (2008) Standard test method for determination of the point load strength index of rock and application to rock strength classifications. ASTM International, West Conshohocken
3. Bar N, Barton N (2017) The Q-slope method for rock slope engineering. Rock Mech Rock Eng 50(4):1–16
4. Barton N, Bandis S (1990) Review of predictive capabilities of JRC-JCS model in engineering practice. In: Barton N, Stephansson O (eds) Rock joints, proc. int. symp. on rock joints, Loen, Norway. Balkema, Rotterdam, pp 603–610
5. Bieniawski ZT (1973) Engineering classification of jointed rock masses. Civ Eng South Afr 15:335–344