@article {37673,
	title = {Supercritical fluid extraction of bitumen free solids separated from a Athabasca oil sand feed and hot water process tailings pond sludge},
	volume = {8},
	year = {1990},
	pages = {871-879},
	publisher = {Petroleum Science and Technology},
	author = {Kotlyar, L. S. and Sparks, B. D. and Woods, J. R. and Ripmeester, J. A.}
}
