@InProceedings{SCI:Par2007a,
  author =    "S.G. Parker and S. Boulos and J. Bigler and A.
              Robison",
  title =     "RTSL: a Ray Tracing Shading Language",
  booktitle = "In 2007 {IEEE}/Eurographics Symposium on
              Interactive Ray Tracing",
  pages =     "149--160",
  year =      "2007",
  keywords =  "rt ray tracing",
}