@TechReport{SCI:Ber2007b,
  author =    "F.F. Bernardon and L.K. Ha and S.P. Callahan and
              J.L.D. Comba and C.T. Silva",
  title =     "Interactive Transfer Function Specification for
              Direct Volume Rendering of Disparate Volumes",
  number =    "UUSCI-2007-007",
  year =      "2007",
  institution = "University of Utah",
  type =      "{SCI} Institute Technical Report",
  keywords =  "volume rendering, transfer functions",
  url =       "http://www.sci.utah.edu/publications/SCITechReports/UUSCI-2007-007.pdf",
}