@article{ahlersboll:2007:dbspektrum,
  author    = {Dirk Ahlers and Susanne Boll},
  title     = {{Geospatially Focused Web Crawling}},
  journal   = {Datenbank-Spektrum -- Special Issue Focused Search (Fokussierte Suche)},
  volume    = {7},
  number    = {23},
  year      = {2007},
  pages     = {3--12},
  publisher = {dpunkt.verlag},
}