Bauval, Robert G. "The Upuaut Project: New Findings in the Southern Shaft of the Queen's Chamber in Cheops Pyramid." Discussions in Egyptology 27 (1993), pp. 5-7.
Cook, R.J. "A Note on the Geometry of the Star-shafts in the Pyramid of Khufu." Discussions in Egyptology 36 (1996), pp. 21-23.
