↑Shaw, Ian, ed. (2000). The Oxford History of Ancient Egypt. Oxford University Press. p. 480. ISBN0-19-815034-2. {{cite book}}: Unknown parameter |وصلة= ignored (help)
↑Kahl, Jochem, 'Ra is my Lord', Searching for the Rise of the Sun God at the Dawn of Egyptian History. Wiesbaden, 2007.