@InProceedings{SCI:Sch1999a,
  author =    "G. Scheuermann and X. Tricoche and H. Hagen",
  title =     "C1-Interpolation for Vector Field Topology
              Visualization",
  booktitle = "Proceeding IEEE Visualization 1999",
  pages =     "271--278",
  year =      "1999",
  url =       "http://www.sci.utah.edu/publications/scheuermann99/interpolation.pdf",
}