@Article{SCI:Eti2014a,
  author =    "T. Etiene and D. Jonsson and T. Ropinski and C.
              Scheidegger and J.L.D. Comba and L. G. Nonato and
              R. M. Kirby and A. Ynnerman and and C. T. Silva",
  title =     "Verifying Volume Rendering Using Discretization
              Error Analysis",
  journal =   "IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER
              GRAPHICS",
  volume =    "20",
  number =    "1",
  pages =     "140-154",
  year =      "2014",
  publisher = "IEEE",
  month =     "January",
  url =       "http://www.sci.utah.edu/publications/Eti2014a/Kirby-79.pdf",
}