1. Strength, fracture and workability of coal;Evans,1966
2. Mass distribution, percent yield, non-settling size and aerodynamic shape factor of respirable coal dust particles;Thakur,1971
3. Coal preparation, the American Institute of mining;Leonard,1968
4. Prediction of coal grindability from exploration data, U.S. Bureau of Mines;Gomez;Report of Investigation,1970
5. Dust formation kinetics as a function of the principal mechanical properties of coal;Panov;Soviet Mining Science, (English Translation,1966