@Article{laptev-etal:00,
  author =       "Ivan Laptev and Helmut Mayer and Tony Lindeberg and
                  Wolfgang Eckstein and Carsten Steger and Albert
                  Baumgartner",
  title =        "Automatic extraction of roads from aerial images
                  based on scale space and snakes",
  journal =      "Machine Vision and Applications",
  year =         "2000",
  volume =       "12",
  number =       "1",
  pages =        "23--31"
}