Daffa, Ali Abdullah al- (1977), The Muslim contribution to mathematics, London: Croom Helm, ISBN 0-85664-464-1 Dallal, Ahmad (1999), «Science, Medicine and Technology», in Esposito, John, The Oxford History of Islam, Oxford University Press, New York Kennedy, E.S. (1956), A Survey of Islamic Astronomical Tables; Transactions of the American Philosophical Society, 46, Philadelphia: American Philosophical Society