@book{719,
	author = {Skiena, Steven S. and Revilla, Miguel A.},
	title = {Programming challenges :},
	publisher = {Springer,},
	year = {c2003.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0817/2002044523-d.html}
}