1. Cave mining—state of the art;Laubscher;J S Afr Inst Min Metall,1994
2. Discontinuity spacings in rock;Priest;Int J Rock Mech Min Sci Geomech Abstr,1976
3. Discontinuities and rock mass geometry;Hudson;Int J Rock Mech Min Sci Geomech Abstr,1979
4. Call RD, Savely JP, Nicholas DE. Estimation of joint set characteristics from surface mapping data. In: Proceedings of the 17th US rock mechanics symposium; 1976. p. 2B21–9.
5. Discontinuity spacings in a crystalline rock;Wallis;Int J Rock Mech Min Sci Geomech Abstr,1980