@InProceedings{steger:96,
  author =       "Carsten Steger",
  title =        "Extracting Curvilinear Structures: A Differential
                  Geometric Approach",
  editor =       "Bernard Buxton and Roberto Cipolla",
  volume =       "1064",
  series =       "Lecture Notes in Computer Science",
  pages =        "630--641",
  booktitle =    "Fourth European Conference on Computer Vision",
  year =         "1996",
  publisher =    "Springer-Verlag"
}