Grabar, Oleg. "Geometry and Ideology: The Festival of Islam and
the Study of Islamic Art." In Islamic Art and Beyond, volume III, Constructing the Study of Islamic Art. Hampshire: Ashgate Publishing Limited, 2006. First published in A Way Prepared, Essays on Islamic Culture in Honor of Richard Bayly Winder, edited by Farhad Kazemi and R. D. McChesney (New York and London: New York University Press, 1988), pp. 145-52.
Islamic Art and Beyond Part One: Theory of Art Chapter V: Geometry and Ideology