@book{63985,
	author = {Boyce, William E. and DiPrima, Richard C.},
	title = {Elementary differential equations and boundary value problems /},
	publisher = {Wiley,},
	year = {c2003.},
	address = {New York :},
	edition = {Course advantage, 7th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/bios/wiley046/2003274080.html}
}