@book{535574,
	author = {Boyce, William E. and DiPrima, Richard C.},
	title = {Elementary differential equations and boundary value problems /},
	publisher = {Wiley,},
	year = {c2009.},
	address = {Hoboken, NJ :},
	edition = {9th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1101/2010483814-d.html}
}