@article {38042,
	title = {Petrographic and chemical characterization of Canadian and German coals in relation to utilization potential 1. Petrographic and chemical characterization of feedcoals},
	volume = {70},
	year = {1991},
	pages = {683-694},
	publisher = {Fuel},
	author = {Kalkreuth, Wolfgang and Steller, Monika and Wieschenkamper, Inge and Ganz, Shadi}
}
