The Sphinx

Geophysical Studies around the Sphinx
A 1978 article by Lambert Dolphin.
http://www.ldolphin.org/egypt/sphinx.html

Redating the Great Shinx at Giza
A 1992 article by Dr. Robert M. Schoch.
http://www.robertschoch.net/Redating%20the%20Great%20Sphinx%20of%20Giza.htm

Robertschoch.net
The Official Website of Dr. Robert M. Schoch, a geologist well known for his research on the Sphinx.
http://www.robertschoch.net/

Archaeometry, Vol. 43, January 2001
"A Geomorphological Study of the Giza Necropolis, with Implications for the Development of the Site", by C. D. Reader.
http://www.blackwell-synergy.com/doi/abs/10.1111/1475-4754.00009

Redating the Sphinx: The Debate
Articles and commentary by David Billington.
http://members.aol.com/davidpb4/