@book{74176,
	author = {Hurwitz, Wallie Abraham,},
	title = {Randwertaufgaben bei Systemen von linearen partiellen Differentialgleichungen erster Ordnung},
	publisher = {Project Gutenberg,},
	year = {2010},
	address = {Salt Lake City, UT :},
	note = {Release date is 2010-08-02},
	url = {https://www.gutenberg.org/ebooks/33330}
}