@book{986,
	author = {Boyce, William E. and DiPrima, Richard C.},
	title = {Elementary differential equations and boundary value problems /},
	publisher = {J. Wiley,},
	year = {c1997.},
	address = {New York :},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/toc/onix02/96019864.html}
}