1. Assessment of rock mass strength for underground excavations;Aydan;Int. J. Rock Mech. & Min. Sci.,1997
2. Characteristics of excessive horizontal stress in Korea by hydraulic fracturing measurement;Bae;KSCE,2005
3. The elasto-plastic response of underground excavations in rock masses that satisfy the Hoek-Brown failure criterion;Carranza-Torres;Int. J. Rock Mech. & Min. Sci.,1999
4. Einstein, H.H., Schwartz, C.W., 1979 Simplified Analysis for Tunnel Supports. Journal of the Geotechnical Engineering Division, ASCE Vol. 105, No GT 4.
5. Einstein, H.H., Indermitte, C.A., Sinfield, J.V., 1998. Creating the Basis for Risk Assessment in Tunnelling – The Decision Aids for Tunnelling (DAT). In: International Conference on Reducing Risk in Tunnel Design and Construction Basel, Switzerland.