http://www.cavepage.magna.com.au/cave/DTT/DTT$-20.html
OUCC News 27th April 1994,Volume 4, Number 20 
Mexico: Easter 1994, Steve Roberts

http://www.cavepage.magna.com.au/cave/DTT/mexico.html
Mexico 1994,The Full Story..., Steve Roberts.

http://www.cancaver.ca/int/mexico/zotz/others/tepana2000.html
Atepolihuit del Tepanahuas, Chris Lloyd, March, 25, 2000.

http://www.burnett2968.freeserve.co.uk/cliffs_caving.htm
CAVING IN MEXICO 1993
http://www.burnett2968.freeserve.co.uk/MEXICO1993%20caving.htm

http://cuetzalan.elsitio.com
Home pages of the Combined Services Caving Association (CSCA) Expedition to Cuetzalan, February 2000.
Pages in English and Spanish