@article {48305,
	title = {Upgrading of Athabasca vacuum tower bottoms (VTB) in supercritical hydrocarbon solvents with activated carbon-supported metallic catalysts},
	volume = {21},
	year = {2007},
	pages = {3490-3498},
	publisher = {Energy \& Fuels},
	author = {Xu, C. and Hamilton, S. and Mallik, A. and Ghosh, M.}
}
