Nabil Swelim: The Dry Moat, the South Rock Wall Of the Inner South Channel, Timelines, Studies in Honour of Manfred Bietak Volume 1, Orientalia Lovaniensia Analecta, p. 149, 2006. See also: The Dry Moat of the Netjerykhet Complex, in Pyramid Studies and Other Essays, Presented to I. E. S. Edwards by Nabil Swelim, London, 1988, and on Nabil Swelim's website: The dry moat