1. Engineering classification of rock masses for the design of tunnel supports;Barton;Rock Mech.,1974
2. Engineering classification of jointed rock masses;Bieniawski;Trans. S. Afr. Inst. Civ. Eng.,1973
3. design of tunnel liner and support system;Deere;Univ. Illinois, Report Prepared for the Office of High Speed Ground Transportation, U.S. Department of Transport, Contract No. 3-0152,1969
4. What are the most useful classification systems for the rockmasses?;Goel,1986
5. A case history of Maneri-Uttarkashi Power Tunnel;Goel,1988