S. Antonio Maria Gianelli / profilo biografico di Giuseppe Frediani. - Frediani, Giuseppe, S.C.I. (OLS)http://pul/name/1836 (Orbis catholicus, 1951)

The influence of Islam on medieval Europe / W. Montgomery Watt. - Watt, William Montgomery. (OLS)http://pul/name/1084 (Edinburgh University Press, 1972)
Includes bibliographical references and index.