1. Coal flotation;Aplan,1976
2. The mathematical modelling of coal washability;Armstrong,1981
3. Kinetics of coal flotation;Banerjee;J. Inst. Fuel,1962
4. Studies in froth flotation of coal;Bennett,1958
5. The floatability of vitrinite, inertinite and composite grains in coals of differing rank;Bennett,1983