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International Journal of Coal Geology > 2013 > 116-117 > Complete > 106-116
Energy Procedia > 2013 > 37 > C > 6746-6759
Energy Procedia > 2009 > 1 > 1 > 1719-1726
International Journal of Coal Geology > 2007 > 72 > 3-4 > 315-324