@TechReport{SCI:Wei95b,
  author =    "D.M. Weinstein and C.R. Johnson",
  title =     "Hierarchical Data Structures for Interactive
              Volume Visualization",
  number =    "UUCS-95-012",
  year =      "1995",
  institution = "University of Utah",
  type =      "School of Computing Technical Report",
  address =   "Salt Lake City, UT",
  keywords =  "scalar field methods, vector field methods, tensor
              field methods, parallel visualization",
  url =       "http://www.sci.utah.edu/publications/dmw95/UUCS-95-012_bw.ps",
  url =       "http://www.sci.utah.edu/publications/dmw95/UUCS-95-012_bw.ps.Z",
  url =       "http://www.sci.utah.edu/publications/dmw95/UUCS-95-012_color.ps.Z",
}