M. W. Daly, Carl F. Petry: Modern Egypt from 1517 to the end of the twentieth century. (=Band 2 von The Cambridge History of Egypt), Cambridge University Press, Cambridge 1998, ISBN 978-0-521-47211-1, S. 18 (Online bei Google Books)
Michael A. Cook, Asad Ahmed, Behnam Sadeghi, Michael Bonner: The Islamic Scholarly Tradition: Studies in History, Law, and Thought in Honor of Professor Michael Allan Cook. BRILL, ISBN 978-90-04-19435-9, S. 154 (Online bei Google Books)