@article {41390,
	title = {Closed-loop extraction method for the recovery of heavy oils and bitumens underlain by aquifers : the vapex process},
	volume = {37},
	year = {1998},
	pages = {41-50},
	publisher = {Journal of Canadian Petroleum Technology},
	url = {http://vapextechnologies.com/References/Ref.7.pdf},
	author = {Butler, R. M. and Mokrys, I. J.}
}
