@InProceedings{steger-etal:96,
  author =       "Carsten Steger and Wolfgang Eckstein and Christian
                  Wiedemann",
  title =        "Update of Roads in {GIS} by Automatic Extraction
                  from Aerial Imagery",
  volume =       "III",
  pages =        "308--317",
  booktitle =    "Proceedings of the Second International Airborne
                  Remote Sensing Conference and Exhibition",
  year =         "1996",
  publisher =    "Environmental Research Institute of Michigan"
}