1. DuBoff W, Kaegi DD, Knoerzer JJ, Spearin EY. Solvent pretreatment of coal to improve coke strength, US Patent 4528069; 1985.
2. Effect of float and sink test liquids on coal quality data;Moxon,1982
3. Options for washability analysis of coal – a literature review;Galvin;Coal Preparat,2006
4. ACARP report C17051: influence of organic liquids on coal carbonisation properties;Iveson,2011
5. Statistics and data analysis: an introduction;Siegel,1988