@InProceedings{vg01springer-kraus,
  author = {Kraus, M. and Ertl, T.},
  title  = {{Topology-Guided Downsampling}},
  year   = {2001},
  pages  = {223-234},
  publisher = {{Springer Verlag, Wien, New York}},
  series = {{Springer Computer Science}},
  booktitle = {{Volume Graphics 2001}},
  editor = {Mueller, K. and Kaufmann, A.}
}