@book{10624,
	author = {Birkhoff, Garrett. and Rota, Gian-Carlo.},
	title = {Ordinary differential equations /},
	publisher = {John Wiley & Sons Inc,},
	year = {2004.},
	address = {[S.l.] :},
	edition = {3rd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/047107411X/chopaconline-20}
}