@InProceedings{SCI:Kni2001a,
  author =    "J.M. Kniss and G. Kindlmann and C.D. Hansen",
  title =     "Interactive Volume Rendering Using
              Multi-Dimensional Transfer Functions and Direct
              Manipulation Widgets",
  booktitle = c-VIS2001,
  pages =     "255--262",
  year =      "2001",
  month =     "October",
  keywords =  "scalar field methods, volume rendering, transfer
              functions, simian, scientific visualization",
  url =       "http://www.sci.utah.edu/publications/jmk01/simian-paper.pdf",
}