11th-century fresco fragment found in Fustat, now kept at the Islamic Art Museum in Cairo (Information source: O'Kane (2012), <i>The Illustrated Guide to the Museum of Islamic Art in Cairo</i>, p. 50)
Al-Ahram
<a rel="nofollow" class="external free" href="http://weekly.ahram.org.eg/2009/976/cu3.htm">http://weekly.ahram.org.eg/2009/976/cu3.htm</a>