@Article{SCI:Par99a,
  author =    "S.G. Parker and M. Parker and Y. Livnat and P.P.
              Sloan and C.D. Hansen and P. Shirley",
  title =     "Interactive Ray Tracing for Volume
              Visualization",
  journal =   "{IEEE} Transactions on Visualization and Computer
              Graphics",
  volume =    "5",
  number =    "3",
  pages =     "238--250",
  year =      "1999",
  month =     "July-September",
  keywords =  "parallel visualization, interactive rt distributed
              interactive ray tracing dirt, visible human,
              scientific visualization",
  url =       "http://www.sci.utah.edu/publications/ieee_tvcg99/tvcg99.ps.gz",
  url =       "http://www.sci.utah.edu/publications/ieee_tvcg99/tvcg99.pdf",
}