@article {37516,
	title = {Isolation and characterization of various types of organic matter in oil sands tailings sludge},
	volume = {69},
	year = {1990},
	pages = {1522-1526},
	publisher = {Fuel},
	author = {Kotlyar, L. S. and Ripmeester, J. A. and Sparks, B. D.}
}
