Joel Mokyr, Ihe Gifts of Athena: Historical Origins of the Knowledge Economy (Princeton, NJ: Princeton University Press, 2002), 29.
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JohnJ. O’Conner and Edmund F. Robertson, “Arab Mathematics: Forgotten Brilliance?” The MacTutor History of Mathematics Archive (School of Mathematics and Statistics, University of St. Andrews, Scotland: 1999), http://www-history.mcs.st-andrews.ac.uk/Historics/Arabic_mat hematics.html.
