@Article{SCI:Wil2011a,
  author =    "S. Williams and M. Petersen and P.-T. Bremer and
              M. Hecht and V. Pascucci and J. Ahrens and M.
              Hlawitschka and B. Hamann",
  title =     "Adaptive Extraction and Quantification of
              Geophysical Vortices",
  journal =   "{IEEE} Transactions on Visualization and Computer
              Graphics, Proceedings of the 2011 {IEEE}
              Visualization Conference",
  volume =    "17",
  number =    "12",
  pages =     "2088--2095",
  year =      "2011",
  url =       "http://www.sci.utah.edu/publications/williams11/Williams_VIS2011.pdf",
}