@Article{SCI:Wes2001a,
  author =    "R. Westermann and C.R. Johnson and T. Ertl",
  title =     "Topology Preserving Smoothing of Vector Fields",
  journal =   j-TVCG,
  volume =    "7",
  number =    "3",
  pages =     "222--229",
  year =      "2001",
  doi =       "10.1109/2945.942690",
  keywords =  "vector field methods, ip image processing signal
              processing, surface processing, ncrr",
  url =       "http://www.sci.utah.edu/publications/Wes2001a/Westerman-TVCG-2001.pdf",
}