↑
Shaw,Ian(2002).The Oxford History of Ancient Egypt.Oxford, England:Oxford University Press.p.61.ISBN0-500-05074-0
↑ Barbara G. Aston, James A. Harrell, Ian Shaw (2000). Paul T. Nicholson and Ian Shaw editors. "Stone," in Ancient Egyptian Materials and Technology, Cambridge, 5-77, pp. 46-47. Also note: Barbara G. Aston (1994). "Ancient Egyptian Stone Vessels," Studien zur Archäologie und Geschichte Altägyptens 5, Heidelberg, pp. 23-26. (See on-line posts: and .)