@book{123767,
	author = {Berechiah ben Natronai, and Zwink, Julia. and ebrary, Inc.},
	title = {Sefer ko'a�h ha-avanim},
	publisher = {Brill,},
	year = {2010.},
	series = {Etudes sur le juda�isme m�edi�eval,},
	address = {Leiden ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10455158}
}