@InProceedings{SCI:But2007a,
  author =    "L. Butler and A.J. Stephens",
  title =     "Bullet Ray Vision",
  booktitle = "Proceedings of the {IEEE} Symposium on Interactive
              Ray Tracing",
  pages =     "167--170",
  year =      "2007",
  keywords =  "interactive rt distributed interactive ray tracing
              dirt, rtcenter",
  url =       "http://www.sci.utah.edu/publications/butler07/BulletRayVision.pdf",
}