1. R. D. Stoessner , and
E. A. Zawadzki “Selection of Dense Medium Cyclone for Low Gravity Fine Coal Cleaning” , in Proc. 3rd Int. Conf. on Hydrocyclones , Oxford , 1987 .
2. M. Sokaski , and
M. R. Geer “Cleaning Unsized Fine Coal in a Dense Medium Cyclone Pilot Plant” , US Bureau of Mines RI 6274 ( 1963 ).