1. Engineering classification of rock masses for the design of rock support;Barton;Rock Mechanics,1974
2. Scale effects or sampling bias?;Barton,1990
3. Engineering classification of jointed rock masses;Bieniawski;Trans. S. African Instn. Civ. Engrs.,1973
4. Rock Mechanics Design in Mining and Tunnelling;Bieniawski,1984
5. Engineering geological mapping;Dearman,1991