@article{Barsky:2003:CMO,
  year = 2003,
  journal = {In Proceedings of the 2003 International Conference on Computational Science and its Applications},
  title = {Camera Models and Optical Systems Used in Computer Graphics: Part I, Object Based Techniques},
  author = {Brian A. Barsky and Daniel R. Horn and Stanley A. Klein and Jeffrey A. Pang and Meng Yu},
  url = {http://graphics.cs.berkeley.edu/papers/Barsky-CMO-2003-05/},
}