1. Stone 2005 World marketing handbook;Montani,2005
2. Influence of rock brittleness on TBM penetration rate in Singapore granite;Gong;Tunnell Underground Space Technol,2007
3. The evaluation of rock brittleness concept on rotary blast hole drills;Altindag;J S Afr Inst Min and Metall,2002
4. Correlation of TBM and drilling machine performances with rock brittleness;Kahraman;Eng Geol,2002
5. AFTES. Guidelines for characterization of rock masses useful for the design and the construction of underground structures. Tunnels et ouvrages Souterrains, Juin; 2003 (177). p. 49.