1. Using a centrifuge for float-and-sink testing. Fine coal;Palowitch,1961
2. Development of a centrifuge float-sink procedure for gravimetric evaluation of ultrafine coals;Cavallaro;J. Coal Quality,1988
3. Centrifugal float-sink testing of fine coal: an interlaboratory test program;Killmeyer;Coal Preparation,1992
4. Improving fine-coal washability procedures;Suarini,1995