- Alienated Minority: The Jews of Medieval Latin Europe
- The Church and the Jews in the Xiiith Century: 1254-1314
- One Thousand and Seven Anonymous and Papal Sovereignty: Jewish Perceptions of the Papacy and Policy in the High Middle Ages (Supplements, No 4)
- Popes, Church, and Jews in the Middle Ages: Confrontation and Response (Variorum Collected Studies Series) (Variorum Collected Studies Series)
- Theater of Acculturation: The Roman Ghetto in the Sixteenth Century













