Lemay, Richard. 1977. “Origin and Success of the Kitab Thamara of Abu Ja’far Ahmad Ibn Yusuf Ibn Ibrahim from the Tenth to the Seventeenth Centuries in the World of Islam and the Latin West”. In Proceedings Of The First International Symposium For The History Of Arabic Science: University Of Aleppo April 5-12, 1976, 417-18. Aleppo: Institute for the History of Arabic Science, University of Aleppo.