@book{8903,
	author = {Wolff, Harold G. and ebrary, Inc.},
	title = {Wolff's headache and other head pain},
	publisher = {Oxford University Press,},
	year = {2001.},
	address = {New York :},
	edition = {7th ed. /},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10269147}
}