Elisheva  Baumgarten. 2002. ?The Jews Of Europe In The Middle Ages (Tenth To Fifteenth Centuries): Proceedings Of The International Symposium Held At Speyer, 20&Ndash;25 October, 2002 By Christoph Cluse?. Zion / ????, 2006, Pp. 506 - 512. https://www.jstor.org/stable/23568096?origin=JSTOR-pdf&seq=1#metadata_info_tab_contents.