@TechReport{SCI:Eti2013a,
  author =    "T. Etiene and D. Jonsson and T. Ropinski and C.
              Scheidegger and J. Comba and L. Gustavo Nonato and
              R.M. Kirby and A. Ynnerman and C.T. Silva",
  title =     "Verifying Volume Rendering Using Discretization
              Error Analysis",
  number =    "UUSCI-2013-001",
  year =      "2013",
  institution = "SCI Institute, University of Utah",
  type =      "SCI Technical Report",
  keywords =  "discretization errors, volume rendering,
              verifiable visualization",
  url =       "http://www.sci.utah.edu/publications/SCITechReports/UUSCI-2013-001.pdf",
}