@article {44964,
	title = {The chemical composition of solubility classes from Athabasca bitumen pitch fractions},
	volume = {21},
	year = {2003},
	pages = {183-199},
	publisher = {Petroleum Science and Technology},
	author = {Zhao, S. and Kotlyar, L. S. and Woods, J. R. and Sparks, B. D. and Gao. J. and Chung, K. H.}
}
