@article {49400,
	title = {Effects of permeability and cementation on the pattern of hydraulically induced fractures in oil sands},
	volume = {31},
	year = {2009},
	pages = {149-162},
	publisher = {Energy Sources},
	url = {http://pdfserve.informaworld.com/567076_770885140_906040342.pdf},
	author = {Pak, A. and Chan, D. H.}
}
