@book{5398,
	author = {Courant, Richard, and Hilbert, David,},
	title = {Methoden der mathematischen Physik II /},
	publisher = {Verlag Von Julius Springer,},
	year = {1937.},
	series = {Die Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen ;},
	address = {Berlin :},
	note = {Includes index.}
}