@book{50257,
	author = {Hartmann, Wilfried,},
	title = {The history of medieval canon law in the classical period, 1140-1234},
	publisher = {Catholic University of America Press,},
	year = {2008.},
	series = {History of medieval canon law},
	address = {Washington, D.C. :},
	url = {http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=360295}
}