1. Brown ET. Block caving geomechanics. The international caving study stage I-1997 through 2000. The University of Queensland, Australia; 2003.
2. Rustan A. Gravity flow of broken rock—what is known and unknown. In: Proceedings of MassMin 2000, Brisbane, Australia; 2000. p. 557–567.
3. Bergmark JE. The calculation of drift spacing and ring burden for sublevel caving. LKAB Memo # RU 76-16, 1975 (in Swedish).
4. A revised form of the Bergmark–Roos equation for describing the gravity flow of broken rock;Kuchta;Mineral Resources Eng,2002
5. Statics and kinematics of granular materials;Nedderman,1992