Roger Tsai's camera calibration software
  <URL:http://www.cs.cmu.edu/~rgw/TsaiCode.html>

Modeling and Calibration of Automated Zoom Lenses. 
  <URL:http://www.cs.cmu.edu/~rgw/>

All Botz, The University of Auckland RoboSoccer Team(Camera calibration)
  RoboCup workshop 1998, 1998-10

Camera Calibration without Feature Extraction
  http://www.inria.fr/rapports/sophia/RR-2204.html

http://www.cis.upenn.edu/~grasp/head/headpage/calibration.html