@article {37735,
	title = {Upgrading of solvent extracted Athabasca bitumen by membrane ultrafiltration},
	volume = {36},
	year = {1990},
	pages = {1279-1282},
	publisher = {American Institute of Chemical Engineers Journal },
	url = {http://www.jstor.org/pss/3881431},
	author = {Sparks, B. D. and Hazlett, J. D. and Kutowy, O. and Tweddie, T. A.}
}
