@Article{SCI:Bha2014a,
  author =    "H. Bhatia and V. Pascucci and R.M. Kirby and P.-T.
              Bremer",
  title =     "Extracting Features from Time-Dependent Vector
              Fields Using Internal Reference Frames",
  journal =   "Computer Graphics Forum",
  volume =    "33",
  number =    "3",
  pages =     "21--30",
  year =      "2014",
  month =     "June",
  url =       "http://www.sci.utah.edu/publications/Bha2014a/Bhatia_EuroVis2014.pdf",
}