@book{121632,
	author = {Picard, R. H. and McGhee, D. F. and ebrary, Inc.},
	title = {Partial differential equations},
	publisher = {De Gruyter,},
	year = {c2011.},
	series = {De Gruyter expositions in mathematics,},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10485452}
}