1. Aspects of energy requirements for rock drilling;Wootton,1974
2. Fragmentation Principles;Atchison,1968
3. Hardness reducers in drilling;Rehbinder;Trans. CSIRO,1948
4. The Surface Energy of Solids;Kuznetzov,1957
5. Standardised tests for determining the physical properties of mine rocks;Obert;U.S. Bur. Mines Rep. Invest. N.O. 3891,1946