@book{44415,
	author = {Hillier, Frederick S. and Lieberman, Gerald J.},
	title = {Introduction to operations research /},
	publisher = {McGraw-Hill Higher Education,},
	year = {c2010},
	address = {New York :},
	edition = {9th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0827/2008039045.html}
}