@Article{SCI:Wal2007c,
  author =    "I. Wald and H. Friedrich and A. Knoll and C.D.
              Hansen",
  title =     "Interactive Isosurface Ray Tracing of Time-Varying
              Tetrahedral Volumes",
  journal =   "{IEEE} Transactions on Visualization and Computer
              Graphics",
  volume =    "13",
  number =    "6",
  pages =     "1727--1734",
  year =      "2007",
  doi =       "10.1109/TVCG.2007.70566",
  keywords =  "rtrt real-time ray tracing, vacet",
  url =       "http://www.sci.utah.edu/publications/wald07/Wald-Vis07.pdf",
}