@InProceedings{SCI:Wal2007f,
  author =    "I. Wald",
  title =     "On fast Construction of {SAH} based Bounding
              Volume Hierarchies",
  booktitle = "Proceedings of the 2007 Eurographics/{IEEE}
              Symposium on Interactive Ray Tracing",
  pages =     "33--40",
  year =      "2007",
  keywords =  "volume rendering, rtcenter",
  url =       "http://www.sci.utah.edu/publications/wald07/fastbuild.pdf",
}