1. Contact Angle Measurements of Water on Coal;Bailey;J. Appl. Chem.,1958
2. Hypothesis for Different Floatabilities of Coals, Carbons and Hydrocarbon Materials;Sun;Min. Eng, Trans. AIME 199,1954
3. Estimating Coal Hydrophobicity;Gutierrez-Rodriguez;Colloids Surf,1984
4. Prediction of Coal Hydrophobicity;Labuschagne;Proc. 5th Annual Pittsburgh Coal Conf., Pittsburgh, PA,1988