@book{170706,
	author = {Freiling, G. and Yurko, V. A. and ebrary, Inc.},
	title = {Lectures on the differential equations of mathematical physics},
	publisher = {Nova Science Publishers,},
	year = {c2008.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10660256}
}