@article {35699,
	title = {Water soluble substances from heavy oils and tar sands bitumens - an overview. In: Oil in freshwater : chemistry, biology, countermeasure technology. Proceedings of the Symposium of Oil Pollution in Freshwater, Edmonton, Alberta, Canada, Oct 15-19, 1984},
	year = {1987},
	pages = {3-9},
	institution = {Pergamon Press},
	address = {New York},
	author = {Hepler, L. G. and Dobrogowska, C. and Kasperski, K.}
}
